Frequency standard

Details Frequency standard Frequency standard

1980-05-05

1982-01-26

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

455314, 324 79R, H04B 1700, H04B 126

Patent

active

043132170

ABSTRACT:
A frequency standard is operable to provide an output signal at a frequency which is directly proportional to the frequency of a received radio frequency signal. The frequency standard circuit contains a mixer which generates an intermediate frequency signal from the radio frequency signal and a local oscillator signal. The frequencies of the local oscillator and the amplified intermediate frequency signals are multiplied or divided by the same factor and then combined in another mixer to obtain an output signal having a frequency directly proportional to that of the received radio frequency signal.

REFERENCES:
patent: 3032650 (1962-05-01), Mathison et al.
patent: 3200337 (1965-08-01), Richardson et al.
patent: 3736510 (1973-05-01), Wu
patent: 3821649 (1974-06-01), Grosjean
patent: 3882398 (1975-05-01), Ogita

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