Amplifier with muting circuit

An amplifier comprising:

• (a) an amplifier circuit having an input to which an electrical input signal is supplied and an output;
• (b) a current mirror circuit having an input connected to the output of said amplifier circuit and an output;
• (c) a single ended push-pull means, formed of a plurality of single ended push-pull circuits including at least first and second single ended push-pull circuits connected in parallel to each other, for amplifying said electrical input signal, said first single ended push-pull circuit being formed on a pair of diode-connected complementary transistors having emitter electrodes which are connected to each other and which are connected to said amplifier circuit, and said second single ended push-pull circuit being formed of a pair of diode-connected complementary transistors having emitter electrodes which are connected to each other, which are electrically insulated from the emitter electrodes of said first single ended push-pull circuit and which are connected to an output terminal from which an output electrical signal is generated;
• (d) bias circuit means, connected between said current mirror circuit and said single ended push-pull means, for supplying bias to said single ended push-pull means;
• and
• (e) muting means, connected at least to said bias circuit and including a muting switch, for stopping the supply of current at least to said bias circuit means in response to the switching operation of said muting switch, thereby muting the output electrical signal.