Radio frequency transmission circuit

Details Radio frequency transmission circuit Radio frequency transmission circuit

1992-09-21

1995-02-14

Wolfe, Willis R.

Multiplex communications

Wide area network

Packet switching

455 76, 455 77, H04B 150

Patent

active

053901681

ABSTRACT:
A radio frequency transmission circuit comprising a first signal generating means and a second signal generating means, means for modulating one of the first and second signals to produce a modulated signal, and mixer means to combine the other of the first and second signals and the modulated signal to produce an RF output signal. The first signal is controlled by a feed back loop comprising a second mixer having an input from both the first and second signals, whereby fluctuations in the frequency of the second signal are compensated for by adjustment of the first signal so as to maintain the RF output signal at a substantially constant frequency.

REFERENCES:
patent: 3882424 (1975-05-01), Debois et al.
patent: 3942116 (1976-03-01), Ferguson
patent: 4259644 (1981-03-01), Iimura
patent: 4355401 (1982-10-01), Ikoma et al.
patent: 4520474 (1985-05-01), Vilmur
patent: 5023930 (1991-06-01), Leslie
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5291474 (1994-03-01), Ikonen et al.

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