Connection device between a telephone responder and a tape recorder

摘要

Cassette interface to ensure the connection between a device of the telephone responder type and a tape recorder, characterised, on the one hand, in that it comprises: a. a recording circuit composed: - of an IC inverter 5 amplifying the signal output by the responder, and driving a divider bridge R 46 R 47; - a resistor-capacitor network R 48, C 39 following the divider bridge R 46, R 47; b. a reading circuit composed of: - an operational amplifier IC 41 mounted as a band-pass filter; - a plurality of variable threshold triggers IC 40 following the operational amplifier IC 41, one operating on the positive half cycles of the signal, the other on the negative half cycles; - and means IC 42, IC 5 for recreating a correct signal. <IMAGE>