Negative capacity circuit for high frequencies applications

Details Negative capacity circuit for high frequencies applications Negative capacity circuit for high frequencies applications

2007-08-16

2010-12-14

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Negative resistance or reactance networks of the active type

C333S188000

Reexamination Certificate

active

07852174

ABSTRACT:
A negative capacitances circuit includes first and second branches connected between a first reference voltage and a second reference voltage. The first branch includes, in series, a first biasing resistor, a first diode, a first bipolar transistor, and a first current source. The second branch includes, in series, a second biasing resistor, a second diode, a second bipolar transistor, and a second current source. The first transistor has a base coupled to a collector of the second transistor and to one input, and the second transistor has a base coupled to a collector of the first transistor and to another input. A capacitor is connected between the emitter of said first transistor and the emitter of said second transistor. A linearization resistor is coupled in parallel between the two emitters of said first and said second transistors.

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