Transconductor stage for high frequency filters

Details Transconductor stage for high frequency filters Transconductor stage for high frequency filters

1992-09-09

1994-07-26

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307521, 307355, 307495, 328167, 330109, H03K 524

Patent

active

053329376

ABSTRACT:
A transconductor differential stage for high-frequency filters, which has a MOS differential input pair with common sources. The drain of each MOS input is connected to the emitter of an npn bipolar. These two matched bipolars have their gates connected together with the gate of a third bipolar, which is diode-connected. Two matched current sources feed the two bipolars, and a third current source feeds the third bipolar. A single controlled current sink is connected to the sources of both MOS input transistors, and also (through a resistor) to the third bipolar.

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patent: 5101126 (1992-03-01), Butler et al.
patent: 5192884 (1992-03-01), Kusano

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