US3597697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integratable gyrator
Assignee: Verizon Laboratories Inc
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Filing: 1969-07-07
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Granted: 1971-08-03
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Expires: 1989-07-07
Abstract
Abstract A two-port gyrator circuit which can be manufactured by standard silicon monolithic techniques, is capable of simulating an inductor with a high Q-factor at frequencies ranging from DC to 100 kHz. without compensation, and has low operating voltage and power dissipation requirements. The gyrator circuit is similar to that disclosed in application Ser. No. 839,036, except that the dual power supplies have magnitudes of 6 volts rather than 12 volts. To achieve maximum dynamic range with DC stages and yet to retain the advantages of the gyrator disclosed in application Ser. No. 839,036, a different amplifier having internal gain and external attenuation is provided.
Inventors
- 👤 John Matarese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:58
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/40; H03H11/42
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
269 words
A gyrator having first and second ports and comprising first and second oppositely phased voltage-to-current converters, each having an input and an output terminal, the input terminal of said first voltage-to-current converter being coupled to the first gyrator port and to the output terminal of said second voltage-to-current converter, the output terminal of said first voltage-to-current converter being coupled to the second gyrator port and to the input terminal of said second voltage-to-current converter, each of said voltage-to-current converters comprising: a. a difference amplifier having first and second transistors and first and second resistors, each resistor having first and second terminals, the first terminals of said resistors being coupled together, the second terminals of said resistors being coupled to the collector electrodes of said first and second transistors respectively, the base electrode of said first transistor being coupled to the input terminal of the associated voltage-to-current converter, the emitter electrode of said first and second transistors being coupled together; b. a resistance divider feedback network coupled between the collector electrode of said second transistor and the base electrode of said second transistor; c. an output stage having an input and an output terminal, the output terminal of said output stage being coupled to the output terminal of the associated voltage-to-current converter; d. means for coupling the input terminal of said output stage to said difference amplifier, said means being coupled to the junction of the first and second resistors in the difference amplifier of said first voltage-to-current converter, said means being coupled to the collector electrode of said first transistor in said difference amplifier in said second voltageto-current converter.
Claim 2
Dependent Claim
269 words
A gyrator having first and second ports and comprising first and second oppositely phased voltage-to-current converters, each having an input and an output terminal, the input terminal of said first voltage-to-current converter being coupled to the first gyrator port and to the output terminal of said second voltage-to-current converter, the output terminal of said first voltage-to-current converter being coupled to the second gyrator port and to the input terminal of said second voltage-to-current converter, each of said voltage-to-current converters comprising: a. a difference amplifier having first and second transistors and first and second resistors, each resistor having first and second terminals, the first terminals of said resistors being coupled together, the second terminals of said resistors being coupled to the collector electrodes of said first and second transistors respectively, the base electrode of said first transistor being coupled to the input terminal of the associated voltage-to-current converter, the emitter electrode of said first and second transistors being coupled together; b. a resistance divider feedback network coupled between the collector electrode of said second transistor and the base electrode of said second transistor; c. an output stage having an input and an output terminal, the output terminal of said output stage being coupled to the output terminal of the associated voltage-to-current converter; d. means for coupling the input terminal of said output stage to said difference amplifier, said means being coupled to the junction of the first and second resistors in the difference amplifier of said first voltage-to-current converter, said means being coupled to the collector electrode of said first transistor in said difference amplifier in said second voltageto-current converter.
Claim 3
Dependent Claim
27 words
A gyrator in accordance with claim 1 wherein the means for coupling the input terminal of the output stage to the difference amplifier includes a zener diode.
Claim 4
Dependent Claim
96 words
A gyrator in accordance with claim 2 wherein each of said voltage-to-current converters further comprises a third transistor coupled between the base electrode of said first transistor and the input terminal of the associated voltage-to-current converter, the emitter electrode of said third transistor being coupled to the base electrode of said first transistor, the base electrode of said third transistor being coupled to the input terminal of the associated voltage-to-current converter and the collector electrodes of said first and third transistors being coupled together, said first and third transistors being arranged in a Darlington circuIt configuration.
Claim 5
Dependent Claim
30 words
The gyrator of claim 3 further comprising means coupled between the emitters of said first and third transistors for controlling the quiescent current flow through said first and third transistors.
Claim 6
Dependent Claim
29 words
The gyrator in accordance with claim 4 wherein said means for controlling the quiescent current flow through said Darlington circuits comprises a series-connected resistor and unidirectional current flow device.
Claim 7
Dependent Claim
64 words
The gyrator of claim 5 wherein said output stage in each of said voltage-to-current converters comprises a constant current source and a fourth transistor, the collector electrode of said fourth transistor being coupled to said constant current source and to the output terminal of said output stage, the base electrode of said fourth transistor being coupled to the input terminal of said output stage.
Claim 8
Dependent Claim
62 words
The gyrator in accordance with claim 6 wherein each of said voltage-to-current converters further comprises means coupled between the base electrode of said fourth transistor and a terminal adapted for connection to a source of potential, said means maintaining the quiescent voltage at the base terminal of said fourth transistor equal to approximately two-thirds of the voltage of the source of potential.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |