Mixer circuit and differential amplifier circuit

Details Mixer circuit and differential amplifier circuit Mixer circuit and differential amplifier circuit

2005-02-22

2005-02-22

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Combining of plural signals

C327S357000

Reexamination Certificate

active

06859085

ABSTRACT:
A mixer circuit is composed of a differential amplifier circuit and a DBM circuit. The differential amplifier circuit has a first bipolar transistor, a second bipolar transistor, a first resistor provided between the respective bases of the first and second bipolar transistors, and a capacitor provided between the base of the second bipolar transistor and the ground. Since the first resistor and the capacitor are provided such that the circuit undergoes RC oscillation in response to the third harmonic of an input signal, the third and higher-order harmonics can be reduced.

REFERENCES:
patent: 5339458 (1994-08-01), Nakatsuka et al.
patent: 6026286 (2000-02-01), Long
patent: 6229395 (2001-05-01), Kay
patent: 6665527 (2003-12-01), Schiltz
patent: 05175755 (1993-07-01), None

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