US3848143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-compensated amplifier circuit
Assignee: Motorola Solutions Inc
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Filing: 1973-03-12
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Granted: 1974-11-12
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Expires: 1993-03-12
Abstract
Abstract A self-compensated semiconductor amplifier operable over the voltage range of a one cell battery and having an output voltage which varies inversely with the voltage applied by the one cell battery. The amplifier has a first transistor including base, emitter and collector electrodes. First and second resistors are serially connected from the collector electrode to the one cell battery. The base electrode is coupled to the junction of the first and second series connected resistors to provide a bias voltage at the base electrode, and for maintaining a constant voltage at the junction of the two resistors. The emitter electrode is coupled to ground potential. An output circuit is coupled to the collector electrode, and the collector electrode develops an output voltage thereat which is less than the bias voltage at the base electrode, and which varies inversely with the one cell battery voltage.
Inventors
- 👤 R Millington
- 👤 J Rexek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:47
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K17/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
191 words
A semiconductor amplifier operable over the voltage range of a one cell battery and having a DC output voltage which varies inversely with the voltage applied by the one cell battery, said amplifier including in combination, a first transistor having base, emitter and collector electrodes, means coupling said emitter electrode to a reference potential, first resistance means having a first terminal coupled to said collector electrode and a second terminal, second resistance means having a first terminal coupled to said first resistance means second terminal and forming a first junction thereat, and a second terminal adapted to be coupled to the one cell battery, means coupling said base electrode to said first junction for providing a bias voltage at said base electrode substantially the same as the voltage at said first junction, and for maintaining a constant voltage at said first junction over the voltage range of the one cell battery, output circuit means coupled to said collector electrode, said collector electrode developing said output voltage thereat, said output voltage being less than the bias voltage at said base electrode and varying inversely with the voltage of the one cell battery.
Claim 2
Dependent Claim
191 words
A semiconductor amplifier operable over the voltage range of a one cell battery and having a DC output voltage which varies inversely with the voltage applied by the one cell battery, said amplifier including in combination, a first transistor having base, emitter and collector electrodes, means coupling said emitter electrode to a reference potential, first resistance means having a first terminal coupled to said collector electrode and a second terminal, second resistance means having a first terminal coupled to said first resistance means second terminal and forming a first junction thereat, and a second terminal adapted to be coupled to the one cell battery, means coupling said base electrode to said first junction for providing a bias voltage at said base electrode substantially the same as the voltage at said first junction, and for maintaining a constant voltage at said first junction over the voltage range of the one cell battery, output circuit means coupled to said collector electrode, said collector electrode developing said output voltage thereat, said output voltage being less than the bias voltage at said base electrode and varying inversely with the voltage of the one cell battery.
Claim 3
Dependent Claim
37 words
The semiconductor amplifier of claim 1 wherein said first resistance means is a resistor and said second resistance means is a resistor, said second resistance means having a resistance substantially twice that of said first resistance means.
Claim 4
Dependent Claim
42 words
The semiconductor amplifier of claim 2 wherein said means coupling said base electrode to said first junction is a resistor, said resistor having a voltAge thereacross, said voltage having a value small as compared to the voltage of the one cell battery.
Claim 5
Dependent Claim
21 words
The semiconductor amplifier of claim 2 wherein said means coupling said base electrode to said first junction is a wire conductor.
Claim 6
Dependent Claim
82 words
The semiconductor amplifier of claim 3 further including input means coupled to said base electrode of said first transistor for coupling an input signal thereto, said output circuit means including second transistor means having base, emitter and collector electrodes, said base electrode being coupled to said collector electrode of said first transistor for receiving said output voltage therefrom, said emitter electrode being coupled to said reference potential, and said collector electrode of said second transistor being coupled to the one cell battery.
Claim 7
Dependent Claim
123 words
The semiconductor amplifier of claim 4 further including second transistor means having base, emitter and collector electrodes, said emitter electrode being coupled to ground potential and said collector electrode being coupled to said emitter electrode of said first transistor, input means coupled to said base electrode of said second transistor for coupling an input signal thereto, said output circuit means including capacitor means coupled to said first transistor collector electrode and to ground potential, third transistor means having base emitter and collector electrodes, said emitter electrode being coupled to ground potential, means coupling said collector electrode of said first transistor to said base electrode of said third transistor, and means coupling said collector electrode of said third transistor to said one cell battery.
Claim 8
Dependent Claim
169 words
A semiconductor amplifier including in combination, a first transistor having base, emitter and collector electrodes, means coupling said emitter electrode to a reference potential for providing a constant potential at said emitter, first resistance means having a first terminal coupled to said collector electrode and a second terminal, second resistance means having a first terminal connected to said first resistance means second terminal and forming a first junction thereat and a second terminal coupled to a source of supply potential, means coupling said base electrode to said first junction for providing a bias voltage at said base electrode substantially the same as the voltage at said first junction and for maintaining a constant voltage at said first junction over a predetermined range of said source of supply potential, output circuit means coupled to said collector electrode, said collector electrode developing an output voltage thereat, said output voltage being less than the bias voltage at said base electrode and varying inversely with the voltage of the source of supply potential.
Claim 9
Dependent Claim
169 words
A semiconductor amplifier including in combination, a first transistor having base, emitter and collector electrodes, means coupling said emitter electrode to a reference potential for providing a constant potential at said emitter, first resistance means having a first terminal coupled to said collector electrode and a second terminal, second resistance means having a first terminal connected to said first resistance means second terminal and forming a first junction thereat and a second terminal coupled to a source of supply potential, means coupling said base electrode to said first junction for providing a bias voltage at said base electrode substantially the same as the voltage at said first junction and for maintaining a constant voltage at said first junction over a predetermined range of said source of supply potential, output circuit means coupled to said collector electrode, said collector electrode developing an output voltage thereat, said output voltage being less than the bias voltage at said base electrode and varying inversely with the voltage of the source of supply potential.
Claim 10
Dependent Claim
134 words
The semiconductor amplifier including in combination, a first transistor having base, emitter and collector electrodes, means coupling said emitter electrode to a reference potential for providing a constant potential at said emitter, first resistance means having a first terminal coupled to said collector electrode and a second terminal, second resistance means having a first terminal connected to said first resistance means second terminal and forming a first junction thereat and a second terminal coupled to a source of supply potential, means coupling said base electrode to said first junction for providing a bias voltage at said base electrode substantially the same as the voltage at said first junction and for maintaining a constant voltage at said first junction, said collector electrode developing a voltage thereat less than the bias voltage at said base electrode.
Claim 11
Dependent Claim
134 words
The semiconductor amplifier including in combination, a first transistor having base, emitter and collector electrodes, means coupling said emitter electrode to a reference potential for providing a constant potential at said emitter, first resistance means having a first terminal coupled to said collector electrode and a second terminal, second resistance means having a first terminal connected to said first resistance means second terminal and forming a first junction thereat and a second terminal coupled to a source of supply potential, means coupling said base electrode to said first junction for providing a bias voltage at said base electrode substantially the same as the voltage at said first junction and for maintaining a constant voltage at said first junction, said collector electrode developing a voltage thereat less than the bias voltage at said base electrode.
Claim 12
Dependent Claim
97 words
A semiconductor amplifier including in combination, a first transistor having base, emitter and collector electrodes, means coupling said emitter electrode to a reference potential, first resistance means having a first terminal coupled to said collector electrode and a second terminal, second resistance means having a first terminal directly connected to saiD first resistance means second terminal and forming a first junction thereat and a second terminal coupled to a source of supply potential, said base electrode being directly connected to said first junction with substantially no resistance therebetween, and output circuit means coupled to said collector electrode.
Claim 13
Dependent Claim
97 words
A semiconductor amplifier including in combination, a first transistor having base, emitter and collector electrodes, means coupling said emitter electrode to a reference potential, first resistance means having a first terminal coupled to said collector electrode and a second terminal, second resistance means having a first terminal directly connected to saiD first resistance means second terminal and forming a first junction thereat and a second terminal coupled to a source of supply potential, said base electrode being directly connected to said first junction with substantially no resistance therebetween, and output circuit means coupled to said collector electrode.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |