Circuit arrangement for voice-controlled hands-free apparatuses

摘要

In a voice-controlled hands-free apparatus, a microprocessor ( mu P) is inserted between a coder-decoder device (CODEC) and a connecting line interface (STID), in such a manner that (by means of a direction control device (RS) which is controlled by the microprocessor) a serial-parallel converter (S/P) which is connected upstream of a microprocessor input can alternately be connected to a transmitting channel output (S) of the coder-decoder device (CODEC), and a receiving channel output (e) of the connecting line interface (STID) and a parallel-serial converter (P/S) (which is connected downstream of a microprocessor output) can alternately be connected to a receiving channel input (E) of the coder-decoder device (CODEC) and a transmitting channel input (s) of the connecting line interface (STID). <IMAGE>