VARIABLE MODULUS SELECTIVE CALLING CIRCUIT

摘要

SELECTIVE CALLING CIRCUIT A selective calling circuit includes a central control code generator for generating a digital stream having repetitions of selected code words of digital information for selectively calling a plurality of remote receiving stations in this circuit. Each remote station includes a decoder for recognizing a predetermined sequence of digital information and reconstructing selected digital code words include therein. A variable modulus counter, responsive to clock pulses and means for selectively varying the modulus of the counter, is included in the code generator at the central control station. A resettable counter that counts in response to clock pulses and is reset in response to received code signals is included in the decoder at the remote station. - i