Negative-resistance-compensated microwave buffer

Details Negative-resistance-compensated microwave buffer Negative-resistance-compensated microwave buffer

1994-04-20

1995-06-13

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

333217, H03F 3191, H03H 1100

Patent

active

054246865

ABSTRACT:
A monolithic microwave buffer amplifier is adapted to increase its input impedance at microwave frequencies. Capacitive reactances in first and second stages of the buffer amplifier appear collectively at the input of the first stage as a negative resistance. Compensating positive resistance is electrically connected to the input of the first stage to cancel the negative resistance and provide a sufficiently high resistive input impedance.

REFERENCES:
patent: 3693105 (1972-09-01), Kleinberg
patent: 4107621 (1978-08-01), Furutani et al.
IBM Technical Disclosure Bulletin, vol. 32, No. 8A, Jan. 1990, "Optimized VLSI CMOS Bypass Capacitor", pp. 260-262.
Wakimoto et al., "A Low-Power Wide-Band Amplifier Using A New Parasitic Capacitance Compensation Technique", IEEE Journal of Solid-State Circuits, vol. 25, No. 1, Feb. 1990, pp. 200-206.

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