Patent US3609592A successfully refreshed from Google Patents.
US3609592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-terminal amplifier adapted to be coupled to a resonator
Assignee: Omega Louis Brandt and Frere SA
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Filing: 1969-06-11
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Granted: 1971-09-28
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Expires: 1989-06-11
Abstract
Abstract A two-terminal amplifier adapted to be connected to a resonator, the amplifier of simple and small design, particularly for use in timepieces, having two complementary transistors series-connected and a single coil coupled with a resonator and connected between the collectors of said transistors.
Inventors
- 👤 Gaston Raval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:04
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/08; G04C3/10; G04C3/108; H; H03; H03B; H03B5/00; H03B5/08; H03B5/12; H03B5/1206; H03B5/1212; H03B5/1231
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
103 words
A two-terminal amplifier for operation practically independently of frequency and adapted to be coupled to a resonator for sustaining oscillation of said resonator, said amplifier including two complementary transistors connected in series, the collector of one transistor being connected to one of said terminals and the collector of the other transistor being connected to the other of said terminals, the base of each transistor being coupled to the collector of the other transistor, an energy source connected between the emitters of said transistors, and at least one bias resistor connected between the base of each transistor and an electrode of the other transistor.
Claim 2
Dependent Claim
103 words
A two-terminal amplifier for operation practically independently of frequency and adapted to be coupled to a resonator for sustaining oscillation of said resonator, said amplifier including two complementary transistors connected in series, the collector of one transistor being connected to one of said terminals and the collector of the other transistor being connected to the other of said terminals, the base of each transistor being coupled to the collector of the other transistor, an energy source connected between the emitters of said transistors, and at least one bias resistor connected between the base of each transistor and an electrode of the other transistor.
Claim 3
Dependent Claim
31 words
A two-terminal amplifier according to claim 1, comprising a mechanical resonator such as a tuning fork or balance wheel and electrodynamic coupling by means of a coil between the resonator amplifier.
Claim 4
Dependent Claim
18 words
A two-terminal amplifier according to claim 1, comprising coupling resistors between the collectors and bases of the transistors.
Claim 5
Dependent Claim
18 words
A two-terminal amplifier according to claim 1, comprising coupling capacitors between the collectors and bases of the transistors.
Claim 6
Dependent Claim
19 words
A two-terminal amplifier according to claim 1, comprising parallel RC-coupling circuits between the collectors and bases of the transistors.
Claim 7
Dependent Claim
32 words
A two-terminal amplifier according to claim 1, comprising a power source and a resistor connected between the emitter of at least one of said transistors and the one terminal of said source.
Claim 8
Dependent Claim
17 words
A two-terminal amplifier according to claim 3, wherein positive temperature coefficient resistors are used as coupling resistors.
Claim 9
Dependent Claim
15 words
An oscillator according to claim 2, comprising a condenser connected in parallel with said coil.
Claim 10
Dependent Claim
25 words
A two-terminal amplifier according to claim 8, comprising a resistor connected between the base and the emitter circuit of at least one of said transistors.
Claim 11
Dependent Claim
21 words
A two-terminal amplifier according to claim 1, characterized by coupling circuits of different type connected to the bases of said transistors.
Claim 12
Dependent Claim
17 words
A two-terminal amplifier according to claim 1, wherein negative temperature coefficient resistors are connected for temperature compensation.
Claim 13
Dependent Claim
16 words
A two-terminal amplifier according to claim 1, wherein a quartz is connected to the amplifier terminals.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |