| 摘要 |
<p>#CMT# #/CMT# The receiver (1) has an antenna (2) for receiving the modulated data or control signals at medium or high rate, or at low rate. The mixers (4,5) mix the incoming, filtered and amplified signals with the high frequency signals supplied by a voltage controlled generator to generate intermediate signals. A polyphase filtering unit (12) supplies the intermediate signals filtered in a polyphase filter (13) to a demodulation stage in medium or high rate mode, or the intermediate baseband signals filtered in the low-pass filters (14,15) to a demodulation stage in low rate mode. #CMT#USE : #/CMT# Frequency shift keying (FSK) modulation signal receiver for remote control system for vehicle, or counting system. #CMT#ADVANTAGE : #/CMT# The receiver can be operated in either medium or high rate data or command reception mode, or in high sensitivity, low rate data or command reception mode. The command and data demodulation operations are facilitated in medium or high rate mode, or low rate mode, while simplifying the demodulation in the low rate mode. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a block diagram of FSK modulation signal receiver. 1 : FSK modulation signal receiver 2 : Antenna 4,5 : Mixers 12 : Polyphase filtering unit 13 : Polyphase filter 14,15 : Low pass filters.</p> |
