US3569849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflection amplifer
Assignee: COM PRODUCTS Inc A CT CORP
•
Filing: 1968-06-11
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Granted: 1971-03-09
•
Expires: 1988-06-11
Abstract
Abstract A semiconductor wide-bandwidth amplifier for driving the deflection coil of cathode-ray tube or like electrical load employs an adjustably-coupled differential input stage and also has an electronic voltage-buffer circuit that makes efficient operation possible with the large supply voltage that drives the load. Two paths for operating power in the amplifier have complimentary effects to maintain a stable output signal when the supply voltage fluctuates. A push-pull output stage has quick bipolar limiting without semiconductor saturation and employs a constant bias to provide stable quiescent bias current during supply voltage variations.
Inventors
- 👤 John J Cassidy
- 👤 Melvin F Silverstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:41
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/30; H03F1/307; H03F3/00; H03F3/30; H03F3/3069; H03F3/3071; H03F3/45; H03F3/45071; H03F3/45076; H03F3/4508; H03F3/45085; H03F3/45089; H03F3/45479; H03K; H03K6/00; H03K6/02; H03F2203/00; H03F2203/45; H03F2203/45314
Claims Analysis
Total Claims: 70
Claim 1
Independent Claim
290 words
An electrical amplifier comprising: A. input terminal means; B. input circuit means 1. having first and second semiconductor amplifying elements forming a differential amplifier with said first element receiving an input signal responsive to the signal at said input terminal means; C. output terminal means; D. a third semiconductor amplifying element connected to receive an input signal responsive to the conduction of said second element and further arranged in circuit with said output terminals to change the signal applied thereto in response to changes in its said input signal; E. a terminal arranged to receive a supply voltage; F. second circuit means connected with said supply terminal and arranged to deliver a substantially uniform operating current to said first and second elements in response to supply voltage at said supply terminal; G. Third circuit means connected with said supply terminal and a selected one of said first and second elements and arranged to offset the output signal from said selected element with a supply-dependent component having a polarity and magnitude responsive to the deviation of the supply voltage of said supply terminal from a selected value; H. fourth circuit means 1. in circuit with said supply terminal and said third element; 2. applying to said third element a signal component responsive to the voltage at said supply terminal and having a phase and magnitude to diminish the signal component said third element receives due to said offset in said output signal of said selected one of said first and second elements; I. So that conduction of said third element is responsive to conduction of said first element in response to said input signal and is comparatively independent of variations in the voltage at said supply terminal from said selected value.
Claim 2
Dependent Claim
290 words
An electrical amplifier comprising: A. input terminal means; B. input circuit means 1. having first and second semiconductor amplifying elements forming a differential amplifier with said first element receiving an input signal responsive to the signal at said input terminal means; C. output terminal means; D. a third semiconductor amplifying element connected to receive an input signal responsive to the conduction of said second element and further arranged in circuit with said output terminals to change the signal applied thereto in response to changes in its said input signal; E. a terminal arranged to receive a supply voltage; F. second circuit means connected with said supply terminal and arranged to deliver a substantially uniform operating current to said first and second elements in response to supply voltage at said supply terminal; G. Third circuit means connected with said supply terminal and a selected one of said first and second elements and arranged to offset the output signal from said selected element with a supply-dependent component having a polarity and magnitude responsive to the deviation of the supply voltage of said supply terminal from a selected value; H. fourth circuit means 1. in circuit with said supply terminal and said third element; 2. applying to said third element a signal component responsive to the voltage at said supply terminal and having a phase and magnitude to diminish the signal component said third element receives due to said offset in said output signal of said selected one of said first and second elements; I. So that conduction of said third element is responsive to conduction of said first element in response to said input signal and is comparatively independent of variations in the voltage at said supply terminal from said selected value.
Claim 3
Dependent Claim
113 words
having a third semiconductor amplifying element connected to receive an input signal responsive to the conduction of said first and second elements and further connected with said fourth and fifth elements to change the conduction therein in opposite directions in response to changes in its said inpUt signal; E. bias circuit means connected with said fourth and fifth amplifying elements and normally applying a fixed bias signal to the combination of said fourth and fifth elements; and F. semiconductor current-limiting switch means connected with said fourth and fifth elements and arranged automatically to shunt input drive signals from whichever one of said fourth and fifth amplifying elements that draws a selected large current.
Claim 4
Dependent Claim
113 words
having a third semiconductor amplifying element connected to receive an input signal responsive to the conduction of said first and second elements and further connected with said fourth and fifth elements to change the conduction therein in opposite directions in response to changes in its said inpUt signal; E. bias circuit means connected with said fourth and fifth amplifying elements and normally applying a fixed bias signal to the combination of said fourth and fifth elements; and F. semiconductor current-limiting switch means connected with said fourth and fifth elements and arranged automatically to shunt input drive signals from whichever one of said fourth and fifth amplifying elements that draws a selected large current.
Claim 5
Dependent Claim
36 words
having a resistance coupling said elements together so that a change in the conduction of one element causes an opposite change in the conduction of the other element; C. output terminal means; D. output circuit means
Claim 6
Dependent Claim
36 words
having a resistance coupling said elements together so that a change in the conduction of one element causes an opposite change in the conduction of the other element; C. output terminal means; D. output circuit means
Claim 7
Dependent Claim
14 words
applying a second extreme supply voltage to the collectors of said further transistors; and
Claim 8
Dependent Claim
14 words
applying a second extreme supply voltage to the collectors of said further transistors; and
Claim 9
Dependent Claim
40 words
a further semiconductor amplifying element receiving an input signal responsive to and corresponding to said output signal from said second amplifying element with said offset and drawing load current responsive to the input signal it receives through said resistive element;
Claim 10
Dependent Claim
40 words
a further semiconductor amplifying element receiving an input signal responsive to and corresponding to said output signal from said second amplifying element with said offset and drawing load current responsive to the input signal it receives through said resistive element;
Claim 11
Dependent Claim
48 words
An amplifier as defined in claim 1 in which said third circuit means comprises a resistive element in series between said supply terminal and said selected amplifying element and delivering further operating current to said selected element dependent on the magnitude of the supply voltage at said terminal.
Claim 12
Dependent Claim
88 words
applying to said third element a signal component responsive to the voltage at said supply terminal and having a phase and magnitude to diminish the signal component said third element receives due to said offset in said output signal of said selected one of said first and second elements; I. So that conduction of said third element is responsive to conduction of said first element in response to said input signal and is comparatively independent of variations in the voltage at said supply terminal from said selected value.
Claim 13
Dependent Claim
88 words
applying to said third element a signal component responsive to the voltage at said supply terminal and having a phase and magnitude to diminish the signal component said third element receives due to said offset in said output signal of said selected one of said first and second elements; I. So that conduction of said third element is responsive to conduction of said first element in response to said input signal and is comparatively independent of variations in the voltage at said supply terminal from said selected value.
Claim 14
Dependent Claim
31 words
arranged with the base of said fourth transistor in circuit with the emitter of said third transistor to receive an input current corresponding to the emitter current of said third transistor;
Claim 15
Dependent Claim
31 words
arranged with the base of said fourth transistor in circuit with the emitter of said third transistor to receive an input current corresponding to the emitter current of said third transistor;
Claim 16
Dependent Claim
28 words
the base of at least said first transistor connected with said input terminal means to receive an input signal responsive to the signal at said input terminal means;
Claim 17
Dependent Claim
28 words
the base of at least said first transistor connected with said input terminal means to receive an input signal responsive to the signal at said input terminal means;
Claim 18
Dependent Claim
18 words
having the bases thereof at the same potential intermediate the potentials at said first and second terminals; and
Claim 19
Dependent Claim
18 words
having the bases thereof at the same potential intermediate the potentials at said first and second terminals; and
Claim 20
Dependent Claim
34 words
one of said further transistors being arranged to receive a signal responsive to the conduction of said drive circuit transistor and to change the collector-emitter conduction therethrough in response to said signal it receives;
Claim 21
Dependent Claim
34 words
one of said further transistors being arranged to receive a signal responsive to the conduction of said drive circuit transistor and to change the collector-emitter conduction therethrough in response to said signal it receives;
Claim 22
Dependent Claim
12 words
drawing load current responsive to said base current through said further resistor;
Claim 23
Dependent Claim
12 words
drawing load current responsive to said base current through said further resistor;
Claim 24
Dependent Claim
64 words
delivering to the emitter of only said one transistor via said separate current path a current responsive to the voltage at said supply terminal and in parallel with the current which the emitter of said one transistor receives from said constant current source, thereby to offset the conduction of said one transistor in proportion to the fluctuation of the voltage at said supply terminal.
Claim 25
Dependent Claim
64 words
delivering to the emitter of only said one transistor via said separate current path a current responsive to the voltage at said supply terminal and in parallel with the current which the emitter of said one transistor receives from said constant current source, thereby to offset the conduction of said one transistor in proportion to the fluctuation of the voltage at said supply terminal.
Claim 26
Dependent Claim
31 words
said fourth transistor being arranged to receive a signal responsive to the conduction of said third transistor and to change the collector-emitter conduction therethrough in responsive to said signal it receives;
Claim 27
Dependent Claim
31 words
said fourth transistor being arranged to receive a signal responsive to the conduction of said third transistor and to change the collector-emitter conduction therethrough in responsive to said signal it receives;
Claim 28
Dependent Claim
36 words
each of which is normally maintained nonconductive by the forward voltage drops of said bias diode elements in series therewith and becomes conductive in response to an excessive current in the resistive element in parallel therewith.
Claim 29
Dependent Claim
36 words
each of which is normally maintained nonconductive by the forward voltage drops of said bias diode elements in series therewith and becomes conductive in response to an excessive current in the resistive element in parallel therewith.
Claim 30
Dependent Claim
81 words
said fifth transistor being arranged to change the collector-emitter conduction therethrough opposite to conduction changes in said fourth transistor; D. a first, normally forward-biased semiconductor element connected between the bases of said fourth and fifth transistors and developing a forward voltage drop therebetween with a polarity to augment the forward bias on each of said fourth and fifth transistors; and E. constant current source means connected to draw a substantially fixed forward current through said semiconductor element from said third transistor.
Claim 31
Dependent Claim
81 words
said fifth transistor being arranged to change the collector-emitter conduction therethrough opposite to conduction changes in said fourth transistor; D. a first, normally forward-biased semiconductor element connected between the bases of said fourth and fifth transistors and developing a forward voltage drop therebetween with a polarity to augment the forward bias on each of said fourth and fifth transistors; and E. constant current source means connected to draw a substantially fixed forward current through said semiconductor element from said third transistor.
Claim 32
Dependent Claim
158 words
the other of said further transistors being arranged to change the collector-emitter conduction therethrough opposite to conduction changes in said one transistor; D. bias circuit means providing a substantially fixed total bias voltage between the bases of said further transistors; E. transistor current source means developing a substantially fixed current at the emitter thereof and having said emitter direct-current coupled to the base of said drive circuit transistor; F. a terminal arranged to receive a supply voltage; G. a resistive element connected between said supply terminal and the base of said drive circuit transistor; and H. amplifier means arranged to draw through said resistive element a current responsive to the input signal for said amplifier circuit, so that when said input signal causes said amplifier means to draw less than a selected current through said resistive element, said current source means supplies base current to said drive circuit transistor without developing a corresponding voltage across said resistive element.
Claim 33
Dependent Claim
158 words
the other of said further transistors being arranged to change the collector-emitter conduction therethrough opposite to conduction changes in said one transistor; D. bias circuit means providing a substantially fixed total bias voltage between the bases of said further transistors; E. transistor current source means developing a substantially fixed current at the emitter thereof and having said emitter direct-current coupled to the base of said drive circuit transistor; F. a terminal arranged to receive a supply voltage; G. a resistive element connected between said supply terminal and the base of said drive circuit transistor; and H. amplifier means arranged to draw through said resistive element a current responsive to the input signal for said amplifier circuit, so that when said input signal causes said amplifier means to draw less than a selected current through said resistive element, said current source means supplies base current to said drive circuit transistor without developing a corresponding voltage across said resistive element.
Claim 34
Dependent Claim
31 words
so that the potential at the end of said further resistor remote from said supply voltage terminal is essentially independent of fluctuations in the supply voltage applied to said supply terminal.
Claim 35
Dependent Claim
31 words
so that the potential at the end of said further resistor remote from said supply voltage terminal is essentially independent of fluctuations in the supply voltage applied to said supply terminal.
Claim 36
Dependent Claim
24 words
connected to receive at the emitters thereof operating currents from the potential at said first supply terminal; and E. a pair of further transistors
Claim 37
Dependent Claim
24 words
connected to receive at the emitters thereof operating currents from the potential at said first supply terminal; and E. a pair of further transistors
Claim 38
Dependent Claim
12 words
having the collectors thereof direct current coupled to said second supply terminal.
Claim 39
Dependent Claim
12 words
having the collectors thereof direct current coupled to said second supply terminal.
Claim 40
Dependent Claim
16 words
applying a further supply voltage intermediate said extreme voltage to the bases of said further transistors.
Claim 41
Dependent Claim
16 words
applying a further supply voltage intermediate said extreme voltage to the bases of said further transistors.
Claim 42
Dependent Claim
40 words
An amplifier as defined in claim 2: A. in which said second element is said selected one; and B. further comprising constant current source means connected with said second element and diminishing the output signal therefrom by a fixed amount.
Claim 43
Dependent Claim
159 words
arranged with the emitter electrodes thereof in circuit with one of said output terminals; D. a pair of operating-voltage terminals arranged to receive supply voltages of opposite polarities and in circuit one with the collectors of said third and fourth transistors and the other with the collector of said fifth transistor; E. at least first and second two-terminal semiconductor elements connected between the base electrodes of said fourth and fifth transistors and arranged to conduct forward current in the same direction such that the forward voltage drops thereacross augment the forward voltage applied to said fourth transistor; F. constant current source means connected normally to draw forward current from the emitter of said third transistor through said first and second semiconductor elements; G. a third two-terminal semiconductor element in series between the base of said fifth transistor and said current source and conducting as forward current the forward current said source draws through said first and second conductor elements.
Claim 44
Dependent Claim
159 words
arranged with the emitter electrodes thereof in circuit with one of said output terminals; D. a pair of operating-voltage terminals arranged to receive supply voltages of opposite polarities and in circuit one with the collectors of said third and fourth transistors and the other with the collector of said fifth transistor; E. at least first and second two-terminal semiconductor elements connected between the base electrodes of said fourth and fifth transistors and arranged to conduct forward current in the same direction such that the forward voltage drops thereacross augment the forward voltage applied to said fourth transistor; F. constant current source means connected normally to draw forward current from the emitter of said third transistor through said first and second semiconductor elements; G. a third two-terminal semiconductor element in series between the base of said fifth transistor and said current source and conducting as forward current the forward current said source draws through said first and second conductor elements.
Claim 45
Dependent Claim
15 words
An amplifier as defined in claim 1 in which: A. said fourth circuit means includes
Claim 46
Dependent Claim
125 words
A transistor amplifier circuit comprising: A. input terminal means; B. first and second transistors forming a differential amplifier with the base of said first transistor receiving an input signal responsive to the signal at said terminal means; C. a constant current source arranged to deliver substantially fixed operating currents to the emitters of both said first and second transistors; D. terminal means for rEceiving operating voltage for said first and second transistors; E. a resistor connected between said supply terminal and the emitter of said second transistor; and F. a constant current source connected with the collector of said second transistor and arranged to conduct a selected current in a direction relative to said second transistor opposite to the direction of current through said resistor.
Claim 47
Dependent Claim
125 words
A transistor amplifier circuit comprising: A. input terminal means; B. first and second transistors forming a differential amplifier with the base of said first transistor receiving an input signal responsive to the signal at said terminal means; C. a constant current source arranged to deliver substantially fixed operating currents to the emitters of both said first and second transistors; D. terminal means for rEceiving operating voltage for said first and second transistors; E. a resistor connected between said supply terminal and the emitter of said second transistor; and F. a constant current source connected with the collector of said second transistor and arranged to conduct a selected current in a direction relative to said second transistor opposite to the direction of current through said resistor.
Claim 48
Dependent Claim
48 words
An amplifier circuit as defined in claim 5 further comprising: A. a pair of further transistors each of which is in a common base arrangement with the emitter thereof in circuit with the collector of a different one of said first and second transistor; and B. supply means
Claim 49
Dependent Claim
90 words
A transistor amplifier circuit for producing an output signal having a component with a known relation to fluctuations in a supply voltage, said amplifier circuit comprising: A. input terminal means; B. first and second transistors forming a differential amplifier and receiving an input signal responsive to the signal at said terminal means; C. a constant current source arranged to deliver a substantially fixed current to the emitters of said first and second transistors; D. a supply terminal to which operating voltage for said transistors is applied; and D. circuit means
Claim 50
Dependent Claim
90 words
A transistor amplifier circuit for producing an output signal having a component with a known relation to fluctuations in a supply voltage, said amplifier circuit comprising: A. input terminal means; B. first and second transistors forming a differential amplifier and receiving an input signal responsive to the signal at said terminal means; C. a constant current source arranged to deliver a substantially fixed current to the emitters of said first and second transistors; D. a supply terminal to which operating voltage for said transistors is applied; and D. circuit means
Claim 51
Dependent Claim
26 words
An amplifier circuit as defined in claim 7 further comprising: A. a resistor connected at one end to said supply terminal; and B. a further transistor
Claim 52
Dependent Claim
21 words
A differential transistor amplifier circuit comprising: A. input terminal means; B. first and second supply terminals; C. first and second transistors,
Claim 53
Dependent Claim
21 words
A differential transistor amplifier circuit comprising: A. input terminal means; B. first and second supply terminals; C. first and second transistors,
Claim 54
Dependent Claim
147 words
In an electronic circuIt wherein a first transistor is arranged to draw a normally constant current from the emitter of an emitter-follower transistor, and said first, constant-current transistor has a resistive element connected between the emitter and a first supply terminal and a semiconductor-junction element connected between the base and said first supply terminal and poled to conduct forward current in the same direction relative to said base as the base-emitter junction of said first transistor, the improvement wherein: A. a first diode is connected to conduct forward current between a second supply terminal and the base of said first transistor in the same direction as the forward conduction as said base; and B. a second diode is connected to conduct forward current between said second supply terminal and the collector of said first transistor in the same direction as the collector-emitter conduction of that transistor. 11.
Claim 55
Dependent Claim
147 words
In an electronic circuIt wherein a first transistor is arranged to draw a normally constant current from the emitter of an emitter-follower transistor, and said first, constant-current transistor has a resistive element connected between the emitter and a first supply terminal and a semiconductor-junction element connected between the base and said first supply terminal and poled to conduct forward current in the same direction relative to said base as the base-emitter junction of said first transistor, the improvement wherein: A. a first diode is connected to conduct forward current between a second supply terminal and the base of said first transistor in the same direction as the forward conduction as said base; and B. a second diode is connected to conduct forward current between said second supply terminal and the collector of said first transistor in the same direction as the collector-emitter conduction of that transistor. 11.
Claim 56
Dependent Claim
27 words
In a feedback amplifier circuit, the combination of: A. a third transistor in an emitter-following arrangement; B. a pair of output terminals; C. fourth and fifth transistors
Claim 57
Dependent Claim
27 words
In a feedback amplifier circuit, the combination of: A. a third transistor in an emitter-following arrangement; B. a pair of output terminals; C. fourth and fifth transistors
Claim 58
Dependent Claim
64 words
An amplifier as defined in claim 11 further comprising: A. semiconductor diode means in circuit between the emitter and base of said third transistor and arranged to conduct forward current in a direction opposite to the forward current conduction of said emitter-base junction of said third transistor; and B. a capacitor element connected in parallel with at least said first and second semiconductor elements.
Claim 59
Dependent Claim
12 words
An electrical amplifier comprising: A. input terminal means; B. input circuit means
Claim 60
Dependent Claim
12 words
An electrical amplifier comprising: A. input terminal means; B. input circuit means
Claim 61
Dependent Claim
79 words
An amplifier as defined in claim 13 in which: A. said bias circuit means includes at least first and second bias circuit elements, each of which is connected with a different one of said fourth and fifth amplifying means; and B. said switch means includes a separate switch element connected with each said bias circuit element and arranged to limit the drive signal applied to the one amplifying element connected therewith when that amplifying element conducts said selected current.
Claim 62
Dependent Claim
34 words
An electronic amplifier comprising: A. drive circuit means including a third transistor arranged to receive a signal at the base thereof; B. output terminal means; C. output circuit means including fourth and fifth transistors
Claim 63
Dependent Claim
34 words
An electronic amplifier comprising: A. drive circuit means including a third transistor arranged to receive a signal at the base thereof; B. output terminal means; C. output circuit means including fourth and fifth transistors
Claim 64
Dependent Claim
41 words
An electronic amplifier as defined in claim 15 further comprising a second normally forward-biased semiconductor element in series with said first semiconductor element to develop a forward voltage drop between the base of said fifth transistor and said current source means.
Claim 65
Dependent Claim
169 words
An amplifier as defined in claim 15: A. in which said first semiconductor element includes at least first and second series-connected diode elements arranged to conduct forward current directed the same as the forward emitter-base conductions of said fourth and fifth transistors; B. further comprising first and second resistors in series between the emitters of said fourth and fifth transistors and interconnected at one terminal of said output terminal means; C. comprising a further diode element in parallel with the series combination of said second resistor and the emitter-base junction of said fifth transistor and at least said second diode element and arranged to conduct forward current in the same direction as said emitter-base junction of said fifth transistor; and D. Comprising a further transistor element having the emitter-base junction thereof in parallel with the series combination of said first resistor and the emitter-base junction of said fourth transistor and at least said first diode element and having the collector thereof connected with the base of said third transistor.
Claim 66
Dependent Claim
104 words
An amplifier as defined in claim 15: A. in which said third transistor is arranged to deliver emitter current to the base of said fourth transistor and to said first semiconductor element; B. further comprising a diode element in circuit between the emitter and base of said third transistor and arranged to conduct forward current in the direction opposite to the forward emitter-base condUction of said third transistor; and C. further comprising a capacitor storage element connected to be charged by said forward voltage drop across said first semiconductor element and arranged to apply said stored charge to the emitter of said third transistor.
Claim 67
Dependent Claim
33 words
An electronic amplifier circuit comprising: A. drive circuit means including a transistor arranged to receive a signal at the base thereof; B. output terminal means; C. output circuit means including two further transistors
Claim 68
Dependent Claim
33 words
An electronic amplifier circuit comprising: A. drive circuit means including a transistor arranged to receive a signal at the base thereof; B. output terminal means; C. output circuit means including two further transistors
Claim 69
Dependent Claim
135 words
An electronic amplifier circuit comprising: A. fourth and fifth transistors of opposite conductivity types arranged in a push-pull configuration to develop an output current corresponding to the difference in the emitter currents thereof; B. bias circuit means providing a substantially fixed total bias voltage between the bases of said fourth and fifth transistors, said bias circuit means including plural semiconductor diode elements connected in series succession with the same direction of forward current conduction between the base of said fourth transistor and the base of said fifth transistor and developing said total bias voltage as the sum of their individual forward voltage drops; C. first and second current-sensing resistive elements each of which is in series with the emitter of one of said fourth and fifth transistors respectively; D. first and second semiconductor switch means
Claim 70
Dependent Claim
135 words
An electronic amplifier circuit comprising: A. fourth and fifth transistors of opposite conductivity types arranged in a push-pull configuration to develop an output current corresponding to the difference in the emitter currents thereof; B. bias circuit means providing a substantially fixed total bias voltage between the bases of said fourth and fifth transistors, said bias circuit means including plural semiconductor diode elements connected in series succession with the same direction of forward current conduction between the base of said fourth transistor and the base of said fifth transistor and developing said total bias voltage as the sum of their individual forward voltage drops; C. first and second current-sensing resistive elements each of which is in series with the emitter of one of said fourth and fifth transistors respectively; D. first and second semiconductor switch means
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |