Portable telephone alarm arrangement has transmitter with encoder and antenna connected to transmission circuit, and receiver with decoder and alarm generator connected to alarm control circuit

摘要

The arrangement has a signal transmitter and a signal receiver. The transmitter contains an encoder (11), a transmission circuit (12) connected to the encoder and an antenna (13) connected to the transmission circuit. The signal receiver contains an antenna (21), a receiver circuit (22) connected to the antenna, a decoder (23) connected to the receiver circuit, an alarm control circuit (24) connected to the decoder and a tone/vibration generator (25) connected to the alarm control circuit.