Frequency converter

Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – Combining of plural signals

Reexamination Certificate

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Details

C323S217000, C323S323000, C327S065000, C363S134000

Reexamination Certificate

active

07002396

ABSTRACT:
A frequency converter includes a transistor pair having a first transistor and a second transistor respectively having collector terminals commonly connected to each other and emitter terminals commonly connected to each other, the commonly-connected collector terminals of the transistor pair being connected to a power supply terminal by way of a first resistor, a third transistor having a collector terminal connected to the power supply terminal by way of a second resistor and an emitter terminal connected to the commonly-connected emitter terminals of the transistor pair, a third resistor having an end connected to the commonly-connected emitter terminals of the transistor pair, and another end grounded by way of a constant current source, and an output terminal connected to the commonly-connected collector terminals of the transistor pair. The frequency converter can exhibit an excellent saturation characteristic and an excellent distortion characteristic even when operating from a low voltage and/or a low current.

REFERENCES:
patent: 4216431 (1980-08-01), Shibata et al.
patent: 5736840 (1998-04-01), Otaka et al.
patent: 6759887 (2004-07-01), Takahashi et al.
patent: 0 416 889 (1991-03-01), None
patent: 1 133 051 (2001-09-01), None
patent: 10-224152 (1998-08-01), None
patent: 11-17454 (1999-01-01), None
patent: 11-17455 (1999-01-01), None
patent: 2000-165148 (2000-06-01), None
patent: 03/009465 (2003-01-01), None

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