Gyrator with loop amplifiers connected to inductive elements

Details Gyrator with loop amplifiers connected to inductive elements Gyrator with loop amplifiers connected to inductive elements

1998-04-08

2000-02-15

Pascal, Robert

Wave transmission lines and networks

Negative resistance or reactance networks of the active type

Simulating specific type of reactance

330254, 331108B, 331135, H03H 1142

Patent

active

060257652

ABSTRACT:
A gyrator includes shunt or feedback nodal capacitors and shunt lossy inductors without shunt load resistors. The effective nodal capacitance is reduced by the introduction of the shunt lossy inductors. The inductors act to discriminate against injected power supply noise, resulting in improved oscillator phase noise. The inductors produces less drop dc voltage than the resistive load, so that larger linear oscillation is obtained with improved oscillator phase noise.

REFERENCES:
patent: 3618133 (1971-11-01), Gingell
patent: 5371475 (1994-12-01), Brown
patent: 5483195 (1996-01-01), Brown
patent: 5587689 (1996-12-01), Bowers
patent: 5635880 (1997-06-01), Brown
"An Integrated Low Power Microwave VCO With Sub-Picosecond Phase Jitter", Proceedings of the 1996 Bipolar/BiCMOS Circuits and Technology Meeting, IEEE, Minneapolis, Minnesota, Sep. 29-Oct. 1, 1996.
"Design Considerations in High-Frequency CMOS Transconductance Amplifier Capacitor (TAC) Filters", F. Krummenacher, Proc. of the International Symposium on Circuits and Systems, vol. 1, No. SYMP.22, May 8, 1989, pp. 100-105.

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