US4918408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillation circuit
Assignee: Toshiba Corp
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Filing: 1988-12-15
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Granted: 1990-04-17
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Expires: 2008-12-15
Abstract
Abstract An oscillator including a CMOS inverter, a feedback reactance connected between the input and output terminals of the CMOS inverter and a CMOS transfer gate connected as a feedback resistor between the input and output terminals of the CMOS inverter, a power source terminal section to which an external voltage is applied, and a power control unit for converting the external voltage to a first internal voltage which is supplied as a power source voltage to the CMOS inverter. The power control unit converts the external voltage to a second internal voltage independently from the first internal voltage and supplies the second internal voltage as a gate control voltage to the CMOS transfer gate.
Inventors
- 👤 Kazuhisa Sakihama
- 👤 Takuya Fujimoto
- 👤 Akihiro Sueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:52
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/36; H03K; H03K3/00; H03K3/01; H03K3/014; H03K3/02; H03K3/027; H03K3/03; H03K3/0307
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
105 words
An oscillation circuit comprising: a power source terminal section to which an external voltage is applied; an oscillator section including an amplifier, a feedback reactance connected between input and output terminals of said amplifier, and a transfer gate connected as a feedback resistor between the input and output terminals of said amplifier and comprised of a plurality of switching elements; and power control means for independently converting the external voltage to first, second, and third internal voltages which are respectively supplied as a power source voltage and as gate control voltages to said amplifier and to the plurality of switching elements comprising the transfer gate.
Claim 2
Dependent Claim
105 words
An oscillation circuit comprising: a power source terminal section to which an external voltage is applied; an oscillator section including an amplifier, a feedback reactance connected between input and output terminals of said amplifier, and a transfer gate connected as a feedback resistor between the input and output terminals of said amplifier and comprised of a plurality of switching elements; and power control means for independently converting the external voltage to first, second, and third internal voltages which are respectively supplied as a power source voltage and as gate control voltages to said amplifier and to the plurality of switching elements comprising the transfer gate.
Claim 3
Dependent Claim
152 words
An oscillation circuit comprising: a power source terminal section to which an external voltage is applied; an oscillator section including an amplifier, a feedback reactance connected between input and output terminals of said amplifier and a transfer gate connected as a feedback resistor between the input and output terminals of said amplifier; and power control means for independently converting the external voltage to first and second internal voltages which are respectively supplied as a power source voltage and a gate control voltage to said amplifier and transfer gate; wherein said power control means includes a first voltage dividing circuit for dividing said external voltage in the first voltage dividing ratio to generate the first internal voltage, and a second voltage dividing circuit for dividing said external voltage in the second voltage dividing ratio to generate the second internal voltage, said second voltage dividing ratio being smaller than said first voltage dividing ratio.
Claim 4
Dependent Claim
152 words
An oscillation circuit comprising: a power source terminal section to which an external voltage is applied; an oscillator section including an amplifier, a feedback reactance connected between input and output terminals of said amplifier and a transfer gate connected as a feedback resistor between the input and output terminals of said amplifier; and power control means for independently converting the external voltage to first and second internal voltages which are respectively supplied as a power source voltage and a gate control voltage to said amplifier and transfer gate; wherein said power control means includes a first voltage dividing circuit for dividing said external voltage in the first voltage dividing ratio to generate the first internal voltage, and a second voltage dividing circuit for dividing said external voltage in the second voltage dividing ratio to generate the second internal voltage, said second voltage dividing ratio being smaller than said first voltage dividing ratio.
Claim 5
Dependent Claim
65 words
An oscillation circuit according to claim 2, wherein said power control means includes first and second potential terminals, said second voltage dividing circuit includes first and second resistive means connected in series between said first and second potential terminals, and the junction between said first and second resistive means of said second voltage dividing circuit serves as an output terminal for said second internal voltage.
Claim 6
Dependent Claim
55 words
An oscillation circuit according to claim 3, wherein said first voltage dividing circuit includes first and second resistive means connected in series between said first and second potential terminals, and the junction between said first and second resistive means of said first voltage dividing circuit serves as an output terminal for said first internal voltage.
Claim 7
Dependent Claim
88 words
An oscillation circuit according to claim 4, wherein said power control means includes mode setting means for setting an oscillation starting mode and changing the oscillation starting mode to an oscillation sustaining mode after the oscillation operation of said oscillator becomes stable, a voltage lowering circuit for converting said external voltage to a third internal voltage lower than said first internal voltage, and a first delivering circuit for delivering said third internal voltage to said amplifier in place of said first internal voltage in said oscillation sustaining mode.
Claim 8
Dependent Claim
58 words
An oscillation circuit according to claim 5, wherein said first delivering circuit includes first switching means for delivering said third internal voltage to said amplifier in said oscillation sustaining mode and second switching means for inhibiting a current from flowing through the first and second resistive means of said first voltage dividing circuit in said oscillation sustaining mode.
Claim 9
Dependent Claim
25 words
An oscillation circuit according to claim 6, wherein said first switching means includes a switching element connected between said voltage lowering circuit and said amplifier.
Claim 10
Dependent Claim
64 words
An oscillation circuit according to claim 7, wherein said second switching means includes a switching element connected in series with said first resistive means between said first potential terminal and said output terminal for said first internal voltage and a switching element connected in series with said second resistive means between said output terminal for said first internal voltage and said second potential terminal.
Claim 11
Dependent Claim
50 words
An oscillation circuit according to claim 7, wherein said second switching means includes a switching element connected between said output terminal for said first internal voltage and said amplifier and a switching element connected in series with said first and second resistive means between said first and second potential terminals.
Claim 12
Dependent Claim
39 words
An oscillation circuit according to claim 5, wherein said power control means includes a second delivering circuit for delivering said third internal voltage to said transfer gate in place of said second internal voltage in said oscillation sustaining mode.
Claim 13
Dependent Claim
59 words
An oscillation circuit according to claim 10, wherein said second delivering circuit includes first switching means for delivering said third internal voltage to said transfer gate in said oscillation sustaining mode, and second switching means for inhibiting a current from flowing through the first and second resistive means of said second voltage dividing circuit in said oscillation sustaining mode.
Claim 14
Dependent Claim
31 words
An oscillation circuit according to claim 11, wherein said first switching means of the second delivering circuit includes a switching element connected between said voltage lowering circuit and said transfer gate.
Claim 15
Dependent Claim
81 words
An oscillation circuit according to claim 12, wherein said second switching means of the second delivering circuit includes a switching element connected in series with said first resistive means of the second voltage dividing circuit between said first potential terminal and said output terminal for said second internal voltage, and a switching element connected in series with said second resistive means of the second voltage dividing circuit between said output terminal for said second internal voltage and said second potential terminal.
Claim 16
Dependent Claim
62 words
An oscillation circuit according to claim 12, wherein said second switching means of the second delivering circuit includes a switching element connected between said output terminal for said second internal voltage and said transfer gate, and a switching element connected in series with said first and second resistive means of the second voltage dividing circuit between said first and second potential terminals.
Claim 17
Dependent Claim
103 words
An oscillation circuit comprising: a power source terminal section to which an external voltage is applied; an oscillator section including an amplifier, a feedback reactance connected between input and output terminals of said amplifier, and a CMOS transfer gate comprised of P-channel and N-channel MOS transistors connected as a feedback resistance between the input and output terminals of said amplifier; and power control means for independently converting the external voltage to first, second, and third internal voltages which are respectively supplied as a power source voltage and gate control voltages to said amplifier and to the MOS transistors in the CMOS transfer gate.
Claim 18
Dependent Claim
103 words
An oscillation circuit comprising: a power source terminal section to which an external voltage is applied; an oscillator section including an amplifier, a feedback reactance connected between input and output terminals of said amplifier, and a CMOS transfer gate comprised of P-channel and N-channel MOS transistors connected as a feedback resistance between the input and output terminals of said amplifier; and power control means for independently converting the external voltage to first, second, and third internal voltages which are respectively supplied as a power source voltage and gate control voltages to said amplifier and to the MOS transistors in the CMOS transfer gate.
Claim 19
Dependent Claim
114 words
A semiconductor device to which a feedback reactance is connected to form an oscillation circuit, comprising: a power source terminal section to which an external voltage is applied; an oscillator section including an amplifier and a transfer gate which is connected between the input and output terminals of said amplifier to serve as a feedback resistance parallel to said feedback reactance and comprised of a plurality of switching elements; and power control means for independently converting the external voltage to first, second, and third internal voltages which are respectively supplied as a power source voltage and as gate control voltages to said amplifier and to the plurality of switching elements comprising the transfer gate.
Claim 20
Dependent Claim
114 words
A semiconductor device to which a feedback reactance is connected to form an oscillation circuit, comprising: a power source terminal section to which an external voltage is applied; an oscillator section including an amplifier and a transfer gate which is connected between the input and output terminals of said amplifier to serve as a feedback resistance parallel to said feedback reactance and comprised of a plurality of switching elements; and power control means for independently converting the external voltage to first, second, and third internal voltages which are respectively supplied as a power source voltage and as gate control voltages to said amplifier and to the plurality of switching elements comprising the transfer gate.
Claim 21
Dependent Claim
95 words
An oscillation circuit according to claim 16, wherein said power control means includes a first voltage dividing circuit for dividing said external voltage in the first voltage dividing ratio to generate the first internal voltage, a second voltage dividing circuit for dividing said external voltage in the second voltage dividing ratio to generate the second internal voltage, and a third voltage dividing circuit for dividing said external voltage in the third voltage dividing ratio to generate the third internal voltage, said second and third voltage dividing ratios being smaller than said first voltage dividing ratio.
Claim 22
Dependent Claim
72 words
An oscillation circuit according to claim 17, wherein said power control means includes first and second potential terminals, said second and third voltage dividing circuits each include first and second resistive means connected in series between said first and second potential terminals, and the junctions between said first and second resistive means of said second and third voltage dividing circuits respectively serve as output terminals for said second and third internal voltages.
Claim 23
Dependent Claim
65 words
An oscillation circuit according to claim 17, wherein said power control means includes first and second potential terminals, said first voltage dividing circuit includes first and second resistive means connected in series between said first and second potential terminals, and the junction between said first and second resistive means of said first voltage dividing circuit serves as an output terminal for said first internal voltage.
Claim 24
Dependent Claim
88 words
An oscillation circuit according to claim 19, wherein said power control means includes mode setting means for setting an oscillation starting mode and changing the oscillation starting mode to an oscillation sustaining mode after the oscillation operation of said oscillator becomes stable, a voltage lowering circuit for converting said external voltage to a fourth internal voltage lower than said first internal voltage, and a first delivering circuit for delivering said fourth internal voltage to said amplifier in place of said first internal voltage in said oscillation sustaining mode.
Claim 25
Dependent Claim
48 words
An oscillation circuit according to claim 20, wherein said power control means includes a second and a third delivering circuit for delivering said fourth internal voltage to the switching elements in the transfer gate in place of said second and third internal voltages in said oscillation sustaining mode.
Claim 26
Dependent Claim
58 words
An oscillation circuit according to claim 20, wherein said first delivering circuit includes first switching means for delivering said fourth internal voltage to said amplifier in said oscillation sustaining mode, and second switching means for inhibiting a current from flowing through the first and second resistive means of said first voltage dividing circuit in said oscillation sustaining mode.
Claim 27
Dependent Claim
88 words
An oscillation circuit according to claim 18, wherein said power control means includes mode setting means for setting an oscillation starting mode and changing the oscillation starting mode to an oscillation sustaining mode after the oscillation operation of said oscillator becomes stable, a voltage lowering circuit for converting said external voltage to a fourth internal voltage lower than said first internal voltage, and a first delivering circuit for delivering said fourth internal voltage to said amplifier in place of said first internal voltage in said oscillation sustaining mode.
Claim 28
Dependent Claim
48 words
An oscillation circuit according to claim 23, wherein said power control means includes a second and a third delivering circuit for delivering said fourth internal voltage to the switching elements in the transfer gate in place of said second and third internal voltages in said oscillation sustaining mode.
Claim 29
Dependent Claim
125 words
An oscillation circuit according to claim 24, wherein said second delivering circuit includes first switching means for delivering said fourth internal voltage to one of the switching elements in the transfer gate in said oscillation sustaining mode, and second switching means for inhibiting a current from flowing through the first and second resistive means of said second voltage dividing circuit in said oscillation sustaining mode; and wherein said third delivering circuit includes first switching means for delivering said fourth internal voltage to another one of the switching elements in the transfer gate in said oscillation sustaining mode, and second switching means for inhibiting a current from flowing through the first and second resistive means of said third voltage dividing circuit in said oscillation sustaining mode.
Claim 30
Dependent Claim
88 words
An oscillation circuit according to claim 16, wherein said power control means includes mode setting means for setting an oscillation starting mode and changing the oscillation starting mode to an oscillation sustaining mode after the oscillation operation of said oscillator becomes stable, a voltage lowering circuit for converting said external voltage to a fourth internal voltage lower than said first internal voltage, and a first delivering circuit for delivering said fourth internal voltage to said amplifier in place of said first internal voltage in said oscillation sustaining mode.
Claim 31
Dependent Claim
48 words
An oscillation circuit according to claim 26, wherein said power control means includes a second and a third delivering circuit for delivering said fourth internal voltage to the switching elements in the transfer gate in place of said second and third internal voltages in said oscillation sustaining mode.
References Cited (Backward Citations)
US4704587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |