Telecommunications – Receiver or analog modulated signal frequency converter – Frequency or phase modulation
Patent
1992-03-09
1994-10-11
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency or phase modulation
455214, 455219, 4552351, 4552401, 4552451, H04B 106, H04B 110
Patent
active
053555309
ABSTRACT:
For realizing a correct measurement of a receiving condition even if the bandwidth of intermediate frequency amplification is narrow, the gain of a variable gain amplitude detector circuit is controlled by an output signal of a function generator circuit so as to cancel the bandwidth characteristic of an intermediate frequency amplifier circuit, to flatten the total bandwidth characteristic of a circuit for detecting an amplitude value of a received signal, thereby eliminating the influence of angle modulation related components in the received signal or desired wave.
REFERENCES:
patent: 3569840 (1971-03-01), Tanaka et al.
patent: 4103240 (1978-07-01), Sakabe
patent: 4313215 (1982-01-01), Jansen
patent: 4479253 (1984-10-01), Daniel, Jr.
patent: 4792991 (1988-12-01), Eness
Eisenzopf Reinhard J.
Le Thanh C.
Matsushita Electric - Industrial Co., Ltd.
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