FSK receiver
申请(专利)号： EP19930107066
专利号： EP0568939A2 主分类号： H04L27/14 申请权利人： NEC
CORPORATION 公开国代码： EP 优先权国家： JP
申请日： 1993-04-30 公开公告日： 1993-11-10
分类号： H04L27/14
发明设计人： MINAMI, YOICHIRO 申请国代码： EP
优先权： 19920506 JP
140954/92
摘 要 附 图：
摘 要：
An FSK receiver includes an amplifier (1), a local oscillation circuit (4), a mixer circuit (2,3), a limiter circuit (8,9), a demodulation circuit (10), a current
detecting circuit, and a control circuit (13). The amplifier (1) amplifies a received wave frequency-modulated with a binary digital signal. The local oscillation circuit (4) outputs a local oscillation frequency signal. The mixer circuit (2,3) mixes an amplified output from the amplifier (1) with the local oscillation frequency signal. The limiter circuit (8,9) receives a baseband signal component output from the mixer circuit (2,3) to limit an amplitude. The demodulator (10) samples the binary signal from the limiter circuit (8,9) with a sampling signal generated by the received wave. The current detecting circuit detects a current flowing in the mixer circuit (2,3). The control circuit (13) controls the gain of the amplifier (1) in accordance with an output from the current detecting circuit. 主权项：
An FSK receiver characterized by comprising:
???amplifying means (1) for amplifying a received wave
权 利 要 求 说 明 书
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FSK receiver
