US5285345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulator switching system having at least one semiconductor switch for adaptation to different load ranges and protection thresholds
Assignee: Mannesmann VDO AG
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Filing: 1991-10-31
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Granted: 1994-02-08
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Expires: 2011-10-31
Abstract
Abstract A modular switching system includes a transistor operative in a switching mode for applying current to a load. Adaptation of the system to accommodate different values of load is attained by coupling an input drive ,signal to a base terminal of the transistor via a variable gain amplifier wherein the gain is established by a load-adaption signal to meet the requisite base current drive signal for the load. Plural emitter terminals of the transistor connected to separate branches of a monitoring circuit, each branch having its own threshold detector, for monitoring of minimum and maximum values of load current.
Inventors
- 👤 Thomas Blumel
- 👤 Joachim Meicher
- 👤 Bernhard Lukas
- 👤 Walter Kares
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:28
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/12; H03K17/08; H03K17/082; H03K17/0826
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
107 words
A switching arrangement, developed as a module, comprising a switch input, at least one semiconductor switch for different load ranges; a no-load monitoring circuit having a threshold circuit and an output terminal; a short-circuit monitoring circuit having a threshold circuit and an output terminal, each of the threshold circuits having a control input, the semiconductor switch having a control electrode, wherein the switch input of the module is connected with the control electrode of the semiconductor switch and to the control inputs of the threshold circuits for adaptation of circuitry of the switch and threshold values of the threshold circuits to a selected value of load range.
Claim 2
Dependent Claim
107 words
A switching arrangement, developed as a module, comprising a switch input, at least one semiconductor switch for different load ranges; a no-load monitoring circuit having a threshold circuit and an output terminal; a short-circuit monitoring circuit having a threshold circuit and an output terminal, each of the threshold circuits having a control input, the semiconductor switch having a control electrode, wherein the switch input of the module is connected with the control electrode of the semiconductor switch and to the control inputs of the threshold circuits for adaptation of circuitry of the switch and threshold values of the threshold circuits to a selected value of load range.
Claim 3
Dependent Claim
38 words
A switching arrangement according to claim 1, further comprising an amplifier providing current to the semiconductor switch for switching current to a load; and a non-inverting amplifier connecting the switch input to a control input of said amplifier.
Claim 4
Dependent Claim
48 words
A switching arrangement according to claim 2, further comprising a transistor having a collector connected to the semiconductor switch, and an inverting amplifier having an output terminal connected to a base of said transistor; wherein the switch input is connected via the non-inverting amplifier to the inverting amplifier.
Claim 5
Dependent Claim
33 words
A switching arrangement according to claim 1, wherein said short circuit monitoring circuit is for monitoring current in said semiconductor switch and said no-load monitoring circuit is for monitoring current in said switch.
Claim 6
Dependent Claim
61 words
A modular circuit according to claim 1, further comprising a second semiconductor switch, a further short-circuit monitoring circuit, and a further no-load monitoring circuit; and wherein each of said semiconductor switches is connected to a respective one of said short-circuit monitoring circuits and a respective one of said no-load monitoring circuits, each of said further monitoring circuits having an output terminal.
Claim 7
Dependent Claim
54 words
A modular circuit according to claim 1, wherein in said no-load monitoring, said threshold circuit comprises a first threshold value circuit, a first low pass filter and a first flip-flop; and in said short-circuit monitoring circuit, said threshold circuit comprises a second threshold value circuit, a second low pass filter, and a second flip-flop.
Claim 8
Dependent Claim
75 words
A modular circuit according to claim 6, wherein, in said no-load monitoring circuit, said first flip-flop is resetable by an output signal of said first low pass filter, and is set by a pulse-like control signal; and said semiconductor switch is responsive to a control signal; said no-load monitoring circuit includes means for combining an output signal of said first flip-flop with the control signal to form an output signal of the no-load monitoring circuit.
Claim 9
Dependent Claim
54 words
A modular circuit according to claim 6, wherein, in said short-circuit monitoring circuit, said second flip-flop is setable by an output signal of said second low pass filter, and is clocked by a pulse-like control signal; and an output signal of said second flip-flop serves as an output signal of said short-circuit monitoring circuit.
Claim 10
Dependent Claim
41 words
A modular circuit according to claim 8, wherein said semiconductor switch is responsive to said control signal; the output signal of said second threshold value circuit controls a feeding of the control signal to said control electrode of said semiconductor switch.
Claim 11
Dependent Claim
40 words
A modular circuit according to claim 8, wherein said semiconductor switch is responsive to said control signal; a further output signal of said second flip-flop controls a feeding of the control signal to said control electrode of said semiconductor switch.
Claim 12
Dependent Claim
64 words
A modular circuit according to claim 5, wherein said module encloses said monitoring circuits; and within said module, a temperature sensor which provides an output signal to control each of said short-circuit monitoring circuits such that, upon an exceeding of a predetermined temperature, each of said short-circuit monitoring circuits outputs a value of voltage indicating a short circuit at each of said semiconductor switches.
Claim 13
Dependent Claim
47 words
A modular circuit according to claim 1, wherein said semiconductor switch is a multi-emitter transistor, wherein one emitter is connected to ground and each of two further emitters are connected respectively to an input of said short-circuit monitoring circuit and an input of said no-load monitoring circuit.
Claim 14
Dependent Claim
47 words
A switching arrangement according to claim 1, further comprising a first amplifier arranged in front of the semiconductor switch, said first amplifier having a control input, a non-inverting amplifier, and the switch input is connected via said non-inverting amplifier to said control input of said first amplifier.
Claim 15
Dependent Claim
157 words
A modular switching system comprising a semiconductor switch providing a load current to a load, said load current flowing through said switch, the magnitude of the load current being dependent on an electric drive signal applied to a drive terminal of said switch; means for monitoring said load current, said monitoring means including a high current threshold circuit and a low current threshold current for signaling values of load current in excess of the high current threshold and below the low current threshold, said threshold circuits being connected separately to said switch; a drive circuit for supplying said drive signal to said drive terminal; circuit means having a control terminal, said circuit means being operative to adjust values of said drive signal and said high current threshold and said low current threshold in response to a control signal applied to said control terminal for adapting operation of said system to a selected value of said load current.
Claim 16
Dependent Claim
157 words
A modular switching system comprising a semiconductor switch providing a load current to a load, said load current flowing through said switch, the magnitude of the load current being dependent on an electric drive signal applied to a drive terminal of said switch; means for monitoring said load current, said monitoring means including a high current threshold circuit and a low current threshold current for signaling values of load current in excess of the high current threshold and below the low current threshold, said threshold circuits being connected separately to said switch; a drive circuit for supplying said drive signal to said drive terminal; circuit means having a control terminal, said circuit means being operative to adjust values of said drive signal and said high current threshold and said low current threshold in response to a control signal applied to said control terminal for adapting operation of said system to a selected value of said load current.
References Cited (Backward Citations)
US4355277A
Cited
JPS61112424A
Cited
US4787007A
Cited
US4750079A
Cited
US4707620A
Cited
US4736267A
Cited
US4831483A
Cited
US4835669A
Cited
US5053911A
Cited
US5189589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |