Monolithic integrated circuit with frequency dependent amplification

A monolithic integrated circuit with frequency dependent amplification, employing a first transistor operated as an emitter follower, and a capacitor applied with one side to the zero point of the circuit, wherein the improvement comprises:

• the capacitor being connected between the emitter of the first transistor which is operated as an emitter follower and the zero point of the circuit;
• a first resistor connecting the collector of the first transistor to a point of constant potential;
• the collector of the first transistor being applied to the base of a second transistor operated as an emitter follower, with the emitter thereof being connected to the base of the first transistor;
• the emitter of a third transistor operated as an emitter follower, being connected across a second resistor to the emitter of said second transistor;
• the base of said third transistor being applied to the point of constant potential;
• and
• a signal input at the base of the second transistor, and a signal output being the collector of one of said second and third transistors, whereby amplification of bass frequencies is increased.