US3906246A
Expired / Lapsed
US
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Transistor control circuit
Assignee: Sony Corp
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Filing: 1974-06-18
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Granted: 1975-09-16
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Expires: 1994-06-18
Abstract
Abstract A transistor control circuit capable of functioning in various modes of operation. The circuit is comprised of four interconnected transistors and three current sources such that the collector currents of the respective transistors admit of the relationship wherein the product of first and second collector currents is equal to the product of third and fourth collector currents such that the output collector current is a function of the first, second and third collector currents. At least one of the current sources includes a signaling source for supplying an input signal current, another of said current sources includes a controllable current source and the other of said current sources comprises a fixed current source. The resultant output collector current can thus be controlled to be proportional to the product of the input signal current and the controlled current, and can be controlled to be proportional to the quotient of the input signal current divided by the controlled current.
Inventors
- 👤 Takashi Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:43
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/16; G06G7/163; H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0017
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
164 words
A transistor control circuit comprising: first transitor means; second transistor means having an emitter electrode connected to the base electrode of said first transistor means; third transistor means having a base electrode connected to the base electrode of said second transistor means; fourth transistor means having a base electrode connected to the emitter electrode of said third transistor means; a first current source for supplying a first current to flow through said first transistor means; a second current source connected to said emitter electrode of said second transistor means for supplying a second current; a third current source connected to said emitter electrode of said third transistor means for supplying a third current; means for connecting said base electrodes of said second and third transistor means to the collector electrode of said first transistor means; and means for deriving an output signal from the collector electrode of said fourth transistor means, said output signal being a function of said first, second and third currents.
Claim 2
Dependent Claim
164 words
A transistor control circuit comprising: first transitor means; second transistor means having an emitter electrode connected to the base electrode of said first transistor means; third transistor means having a base electrode connected to the base electrode of said second transistor means; fourth transistor means having a base electrode connected to the emitter electrode of said third transistor means; a first current source for supplying a first current to flow through said first transistor means; a second current source connected to said emitter electrode of said second transistor means for supplying a second current; a third current source connected to said emitter electrode of said third transistor means for supplying a third current; means for connecting said base electrodes of said second and third transistor means to the collector electrode of said first transistor means; and means for deriving an output signal from the collector electrode of said fourth transistor means, said output signal being a function of said first, second and third currents.
Claim 3
Dependent Claim
25 words
A transistor control circuit in accordance with claim 1 further comprising means for controlling the current supplied by at least one of said current sources.
Claim 4
Dependent Claim
35 words
A transistor control circuit in accordance with claim 2 further comprising means for supplying first energizing potentials to said second and third transistor means and second energizing potentials to said first and fourth transistor means.
Claim 5
Dependent Claim
65 words
A transistor control circuit in accordance with claim 3 wherein said first current source includes a signaling source for supplying an input signal current; said third current source comprises a fixed current source; and said second current source includes said current controlling means, such that the amplitude of said output signal is proportional to the product of said input signal current and said controlled current.
Claim 6
Dependent Claim
65 words
A transistor control circuit in accordance with claim 3 wherein said second current source includes a signaling source for supplying an input signal current; said third current source comprises a fixed current source; and said first current source includes said current controlling means, such that the amplitude of said output signal is proportional to the product of said input signal current and said controlled current.
Claim 7
Dependent Claim
32 words
A transistor control circuit in accordance with claim 5 wherein said first current source comprises a series circuit formed of a resistor and a direct-current voltage source having a controllable output voltage.
Claim 8
Dependent Claim
59 words
A transistor control circuit in accordance with clAim 5 wherein said first current source comprises transistor means having a collector electrode connected to said collector electrode of said first transistor means and an emitter electrode connected to said energizing potential supply means through a resistor; and a direct-current voltage source connected to the base electrode of said transistor means.
Claim 9
Dependent Claim
50 words
A transistor control circuit in accordance with claim 5 wherein said first current source comprises a variable direct-current voltage source connected to the emitter electrode of said first transistor and wherein the collector electrode of said first transistor means is connected to said energizing potential supply means through a resistor.
Claim 10
Dependent Claim
66 words
A transistor control circuit in accordance with claim 3 wherein said first current source includes a signaling source for supplying an input signal current; said second current source comprises a fixed current source; and said third current source includes said current controlling means, such that the amplitude of said output signal is proportional to the quotient of said input signal current divided by said controlled current.
Claim 11
Dependent Claim
46 words
A transistor control circuit in accordance with claim 9 wherein said third current source comprises transistor means having its collector-emitter circuit connected to the emitter electrode of said third transistor means; and a variable direct-current voltage source connected to the base electrode of said transistor means.
Claim 12
Dependent Claim
54 words
A transistor control circuit in accordance with claim 1 wherein said first current source includes a signaling source for supplying a first input signal; and said second current source includes a signaling source for supplying a second input signal, such that said output signal is a product of said first and second input signals.
Claim 13
Dependent Claim
50 words
A transistor control circuit in accordance with claim 1 wherein one of said current sources includes a signaling source for supplying an input signal current; another of said current sources includes means for controlling the current supplied thereby; and the other of said current sources comprises a fixed current source.
Claim 14
Dependent Claim
204 words
A multiplier circuit comprising: a first pair of transistors; a second pair of transistors each having an emitter electrode connected to a respective base electrode of said first pair of transistors; a third pair of transistors each having a base electrode connected to a respective base electrode of said second pair of transistors; a fourth pair of transistors each having a base electrode connected to a respective emitter electrode of said third pair of transistors; first current source means including a first signaling source for supplying first input signal currents through said first pair of transistors; second current source means connected to the emitter electrodes of said second pair of transistors and including a second signaling source for supplying second input signal currents; third current source means connected to the emitter electrodes of said third pair of transistors and including a fixed current source; means for connecting each of the collector electrodes of said first pair of transistors to a respective base electrode of said second pair of transistors; and means connected in common to the collector electrodes of said fourth pair of transistors through which flows an output current that is proportional to the product of said first and second input signal currents.
Claim 15
Dependent Claim
204 words
A multiplier circuit comprising: a first pair of transistors; a second pair of transistors each having an emitter electrode connected to a respective base electrode of said first pair of transistors; a third pair of transistors each having a base electrode connected to a respective base electrode of said second pair of transistors; a fourth pair of transistors each having a base electrode connected to a respective emitter electrode of said third pair of transistors; first current source means including a first signaling source for supplying first input signal currents through said first pair of transistors; second current source means connected to the emitter electrodes of said second pair of transistors and including a second signaling source for supplying second input signal currents; third current source means connected to the emitter electrodes of said third pair of transistors and including a fixed current source; means for connecting each of the collector electrodes of said first pair of transistors to a respective base electrode of said second pair of transistors; and means connected in common to the collector electrodes of said fourth pair of transistors through which flows an output current that is proportional to the product of said first and second input signal currents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |