Direct conversion receiver especially suitable for frequency shi

Details Direct conversion receiver especially suitable for frequency shi Direct conversion receiver especially suitable for frequency shi

1991-07-23

1994-11-01

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455300, 455317, 455333, H04B 116, H04B 100

Patent

active

053614089

ABSTRACT:
A direct conversion receiver for providing a direct conversion of a radio frequency signal having a carrier frequency comprises a local oscillator for substantially equal frequency to the carrier, and a semiconductor integrated circuit mounting mixers and amplifiers for amplifying inputs to the mixer. The amplifiers amplify the local oscillation signals and/or radio frequency signal inputted from the outside of the semiconductor integrated circuit and supply the amplified signals to the mixers. The mixers mix these inputted signals and output the mixed signals to the outside of the semiconductor integrated circuit. By thus forming the receiver, radiation of the local oscillation signals to outside of the receiver and leakage inside thereof can be suppressed.

REFERENCES:
patent: 4580290 (1986-04-01), Ushida
patent: 4675911 (1987-06-01), Sokolov et al.
patent: 4987374 (1991-01-01), Burke
patent: 5060298 (1991-10-01), Waugh et al.
patent: 5083050 (1992-01-01), Vasile
Kohji Chiba et al., "Performance of Direct Conversion FSK Receiver," Proceedings for Spring Cession of National Conference by the Electronic Information and Communication Engineers Society, 1987, No. 2232, pp. 10-110.

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