Frequency conversion apparatus

Details Frequency conversion apparatus Frequency conversion apparatus

2006-10-24

2006-10-24

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Frequency or repetition rate conversion or control

C327S114000

Reexamination Certificate

active

07126390

ABSTRACT:
A frequency conversion apparatus has a high-frequency amplifier for amplifying an input high-frequency signal, a mixer for mixing the output signal of the high-frequency amplifier with a local oscillation signal, a filter for restricting the band of the output signal of the mixer to permit passage of only components within a predetermined band, and a variable filter provided between the high-frequency amplifier and the mixer and having a controllable cut-off frequency. With this configuration, it is possible to reduce back talk at low cost without inviting variation of input return loss characteristics.

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patent: 1-238321 (1989-09-01), None
Humphries et al., Industrial Electronics, 1983, Breton Publishers, p. 38.

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