US3701052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of amplitude control of electromechanical oscillators
Assignee: TDK Micronas GmbH
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Filing: 1971-07-15
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Granted: 1972-10-24
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Expires: 1991-07-15
Abstract
Abstract This is a method and circuit for controlling electro-mechanical oscillators in electronic watches which are excited by a circuit containing only one driving coil. The voltage which is induced in the coil by the oscillator is used as a measure for controlling the width of the exciting pulse.
Inventors
- 👤 Hans Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:22
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/30; G; G04; G04C; G04C3/00; G04C3/04; G04C3/06; G04C3/065; G04C3/067; G04C3/068; G04C3/069
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
220 words
A circuit for controlling the amplitude of oscillation appearing across a coil, including a drive transistor and a control transistor of complemeNtary conductivity type thereto, the collector of said drive transistor being connected to one end of said coil and coupled to the base of said control transistor, the base of said drive transistor being connected to the collector of said control transistor, the emitter of said drive transistor being connected to one supply terminal, the emitter of said control transistor coupled to another supply terminal, and the other terminal of said coil being connected to said other supply terminal comprising: a first transistor of the same conductivity type as said control transistor; a second transistor of the same conductivity type as said drive transistor, the base of said second transistor being connected to the collector of said first transistor, the base of said first transistor and the collector of said second transistor being connected to said other supply terminal, the emitter of said first transistor being coupled to the collector of said drive transistor; and a first resistor-capacitor parallel network, one terminal of said first resistor-capacitor network being connected to the emitter of said second transistor and coupled to the base of said control transistor, the other terminal of said resistorcapacitor network being connected to said one supply terminal.
Claim 2
Dependent Claim
220 words
A circuit for controlling the amplitude of oscillation appearing across a coil, including a drive transistor and a control transistor of complemeNtary conductivity type thereto, the collector of said drive transistor being connected to one end of said coil and coupled to the base of said control transistor, the base of said drive transistor being connected to the collector of said control transistor, the emitter of said drive transistor being connected to one supply terminal, the emitter of said control transistor coupled to another supply terminal, and the other terminal of said coil being connected to said other supply terminal comprising: a first transistor of the same conductivity type as said control transistor; a second transistor of the same conductivity type as said drive transistor, the base of said second transistor being connected to the collector of said first transistor, the base of said first transistor and the collector of said second transistor being connected to said other supply terminal, the emitter of said first transistor being coupled to the collector of said drive transistor; and a first resistor-capacitor parallel network, one terminal of said first resistor-capacitor network being connected to the emitter of said second transistor and coupled to the base of said control transistor, the other terminal of said resistorcapacitor network being connected to said one supply terminal.
Claim 3
Dependent Claim
51 words
A circuit according to claim 1, further comprising: a second resistor-capacitor parallel network, one terminal of said second resistor-capacitor network being connected to the collector of said second transistor and the emitter of said control transistor, the other terminal of said second resistor-capacitor network being connected to said other supply terminal.
Claim 4
Dependent Claim
14 words
A circuit according to claim 1, wherein said one supply terminal is circuit ground.
Claim 5
Dependent Claim
238 words
A circuit for controlling the amplitude of oscillation appearing across a coil, including a drive transistor and a control transistor of complementary conductivity type thereto, the collector of said drive transistor being connected to one end of said coil and coupled to the base of said control transistor, the base of said drive transistor being connected to the collector of said control transistor, the emitter of said drive transistor being connected to one supply terminal, the base of said control transistor being coupled to said one supply terminal, the emitter of said control transistor coupled to another supply terminal, and the other terminal of said coil being connected to said other supply terminal comprising: a first transistor of the same conductivity type as said control transistor; a second transistor of the same conductivity type as said drive transistor, the base of said second transistor being coupled to the collector of said first transistor, the base of said first transistor being coupled to said other supply terminal, the emitter of said first transistor being coupled to the collector of said drive transistor and the emitter of said second transistor being connected to said one supply terminal; and a first resistor-capacitor parallel network, one terminal of said first resistor-capacitor network being connected to the collector of said second transistor and the emitter of said control transistor, the other terminal of said resistor-capacitor network being connected to said other supply terminal.
Claim 6
Dependent Claim
238 words
A circuit for controlling the amplitude of oscillation appearing across a coil, including a drive transistor and a control transistor of complementary conductivity type thereto, the collector of said drive transistor being connected to one end of said coil and coupled to the base of said control transistor, the base of said drive transistor being connected to the collector of said control transistor, the emitter of said drive transistor being connected to one supply terminal, the base of said control transistor being coupled to said one supply terminal, the emitter of said control transistor coupled to another supply terminal, and the other terminal of said coil being connected to said other supply terminal comprising: a first transistor of the same conductivity type as said control transistor; a second transistor of the same conductivity type as said drive transistor, the base of said second transistor being coupled to the collector of said first transistor, the base of said first transistor being coupled to said other supply terminal, the emitter of said first transistor being coupled to the collector of said drive transistor and the emitter of said second transistor being connected to said one supply terminal; and a first resistor-capacitor parallel network, one terminal of said first resistor-capacitor network being connected to the collector of said second transistor and the emitter of said control transistor, the other terminal of said resistor-capacitor network being connected to said other supply terminal.
References Cited (Backward Citations)
US3530662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |