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专利名称：Time division duplex transmitter-receiver发明人：Fukuda, Kunio, c/o Patents Div. Sony Corp.申请号：EP92301409.6申请日：19920220公开号：EP0500373A3公开日：19930811
专利附图：
摘要：A time division duplex transmitter-receiver is disclosed which is capable ofdividing one channel into transmission slots (T) and reception slots (R) with respect totime and performing time-divided transmission and reception of data during such slots (T,R) respectively. The transmitter-receiver comprises a transmitting circuit (10) having
means (62, 63, , 65, 66) for generating a carrier signal (Si) ; a receiving circuit (20) havingan oscillator (62, 67, 68) for generating an oscillation signal (Sj) for converting a receivedsignal (Sir) into an intermediate frequency signal (Sjr), and a mixer (25) to mix the receivedsignal (Sir) with the oscillation signal (Sj) ; a signal path (15, 33, 23) for supplying a leakagesignal (S39) from the transmitting circuit (10) to the receiving circuit (20) ; a frequencydiscriminator (72) for converting the frequency (fj) of the intermediate frequency signal(Sjr) obtained from the receiving circuit (20) into a voltage (V72) ; means (31) for storingthe voltage therein ; and means (31, 61) for controlling the oscillation frequency (fi-fj) ofthe oscillator in accordance with voltage (V72). Since the frequency (fi-fj) of oscillation iscontrolled in conformity with the reference voltage (V72), an AFC action can be executedunder varied environmental conditions.
申请人：SONY CORPORATION
地址：7-35 Kitashinagawa 6-chome Shinagawa-ku Tokyo 141 JP
国籍：JP
代理机构：Cotter, Ivan John
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