The invention discloses a muting circuit of navigation equipment. The mute circuit comprises a plurality of triodes, a diode D11, a plurality of resistors and a plurality of capacitors. A main control chip is controlled through a mute button in a driving cab, and the main control chip is connected with a base electrode and an emitting electrode of the triode Q40 of an audio muting circuit through two signal output pins according to signals of the mute button, and then controls muting of the left pin and the right pin through an audio power amplifier circuit.
Muting circuit of navigation equipment
2015-12-30
Patent
Electronic Resource
English
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |