US4193046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezo-electric oscillators with automatic gain control
Assignee: KINSEKISHA LABS Ltd
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Filing: 1978-11-06
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Granted: 1980-03-11
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Expires: 1998-11-06
Abstract
Abstract A field effect transistor is used in the bias circuit of an oscillation transistor of a piezo-electric oscillator, and a diode is connected between the gate electrode of the field effect transistor and the base electrode of the oscillation transistor with a polarity to pass current from the gate electrode to the base electrode. The source electrode of the field effect transistor is connected to the base electrode of the oscillation transistor and the drain electrode of the field effect transistor is connected to a power source.
Inventors
- 👤 Tadataka Chiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:28
CPC Classifications
H; H03; H03L; H03L5/00; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/36; H03B5/362; H03B1/00; H03B1/04; H03B2200/00; H03B2200/0002; H03B2200/0008; H03B2200/001; H03B2200/006; H03B2200/0062
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
95 words
In a piezo-electric oscillator of the type comprising a piezo-electric oscillator element, an oscillation transistor connected to control the oscillation of said oscillator element, and base bias circuit means for driving said oscillation transistor, the improvement wherein said base bias circuit means comprises a field effect transistor having a drain connected to a power source and a gate and source connected in common to the base of said oscillation transistor, and a diode connected between said gate and said base to rectify the oscillation signal being passed to the gate of said field effect transistor.
Claim 2
Dependent Claim
95 words
In a piezo-electric oscillator of the type comprising a piezo-electric oscillator element, an oscillation transistor connected to control the oscillation of said oscillator element, and base bias circuit means for driving said oscillation transistor, the improvement wherein said base bias circuit means comprises a field effect transistor having a drain connected to a power source and a gate and source connected in common to the base of said oscillation transistor, and a diode connected between said gate and said base to rectify the oscillation signal being passed to the gate of said field effect transistor.
Claim 3
Dependent Claim
22 words
The piezo-electric oscillator according to claim 1 wherein said oscillator element is connected between the base of said oscillation transistor and ground.
Claim 4
Dependent Claim
23 words
The piezo-electric oscillator according to claim 1 wherein said oscillator element is connected between the base and the collector of said oscillation transistor.
Claim 5
Dependent Claim
52 words
The piezo-electric oscillator according to claim 1, 2 or 3 wherein a resistor is connected between the cathode of said diode and the base of said oscillation transistor, and a capacitor is connected between the cathode of said diode and an output terminal which delivers the output signal from said oscillation transistor.
Claim 6
Dependent Claim
43 words
The piezo-electric oscillator according to claim 4 wherein said capacitor has one end connected to the cathode of said diode and the other end connected to a junction of at least two serially connected resistors connected to the collector of said oscillation transistor.
Claim 7
Dependent Claim
33 words
The piezo-electric oscillator according to claim 4 wherein said capacitor has one end connected to the cathode of said diode and the other end directly connected to the collector of said oscillation transistor.
Claim 8
Dependent Claim
27 words
The piezo-electric oscillator according to claim 4 wherein a resistor is connected between the source of said field effect transistor and the base of said oscillation transistor.
Claim 9
Dependent Claim
20 words
The piezo-electric oscillator according to claim 4 wherein a capacitor is connected between the anode of said diode and ground.
Claim 10
Dependent Claim
22 words
The piezo-electric oscillator according to claim 4 wherein a capacitor is connected between the anode of said diode and said power source.
Claim 11
Dependent Claim
102 words
In a piezo-electric oscillator of the type comprising a piezo-electric oscillator element, an oscillation transistor connected to control the oscillation of said oscillator element, and base bias circuit means for driving said oscillation transistor, the improvement wherein said base bias circuit means comprises a field effect transistor having a drain connected to a power source and a source connected to the base of said oscillation transistor, and a diode having an anode connected to the gate of said field effect transistor and a cathode connected to ground for rectifying the oscillation signal being passed to the gate of said field effect transistor.
Claim 12
Dependent Claim
102 words
In a piezo-electric oscillator of the type comprising a piezo-electric oscillator element, an oscillation transistor connected to control the oscillation of said oscillator element, and base bias circuit means for driving said oscillation transistor, the improvement wherein said base bias circuit means comprises a field effect transistor having a drain connected to a power source and a source connected to the base of said oscillation transistor, and a diode having an anode connected to the gate of said field effect transistor and a cathode connected to ground for rectifying the oscillation signal being passed to the gate of said field effect transistor.
Claim 13
Dependent Claim
22 words
The piezo-electric oscillator according to claim 10 wherein said oscillator element is connected between the base of said oscillation transistor and ground.
Claim 14
Dependent Claim
23 words
The piezo-electric oscillator according to claim 10 wherein said oscillator element is connected between the base and the collector of said oscillation transistor.
References Cited (Backward Citations)
JPS5024066A
Cited
US3982210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |