Transconductance stage and device for communication by...

Details Transconductance stage and device for communication by... Transconductance stage and device for communication by...

2005-09-13

2005-09-13

Vo, Nguyen T. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C330S252000, C330S296000

Reexamination Certificate

active

06944438

ABSTRACT:
A transconductance stage includes at least one principal bipolar transistor having a base linked to an input terminal, a collector linked to an output terminal, and an emitter linked to a supply terminal through a resistor. At least one bipolar compensation transistor is connected in parallel to the principal transistor and linked without going through the resistor to the supply terminal. The value REof the resistance is chosen so that RE*I0>VT/2, where VTis the thermal voltage and I0is the quiescent current of the principal transistor.

REFERENCES:
patent: 4247825 (1981-01-01), Berger
patent: 4287478 (1981-09-01), Berger
patent: 5826182 (1998-10-01), Gilbert
patent: 5903185 (1999-05-01), Cargill
patent: 6011980 (2000-01-01), Nagano et al.
patent: 6556082 (2003-04-01), Wang et al.
patent: 0613248 (1994-08-01), None

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