Patent ID: 6424220
Filing Date: 2002-07-23
Classification: H03F

Abstract:
A single-ended push-pull amplifier circuit suitable for power amplification of audio signals, among other applications, the amplifier circuit comprising:(a) a first and a second supply terminal; (b) an output terminal to be connected to a load; (c) first current control means connected between the first supply terminal and the output terminal for controlling current flow therebetween, the first current control means having a control terminal; (d) second current control means connected between the second supply terminal and the output terminal for controlling current flow therebetween, the second current control means having a control terminal; (e) a serial connection of a first and a second resistor, the second resistor being connected to the control terminal of either of the first and the second current control means; (f) a first bias transistor connected between the control terminal of the other of the first and the second current control means and the first resistor, the first bias transistor having a control terminal connected to said other of the first and the second current control means; and (g) a second bias transistor connected between the control terminals of the first and the second current control means, the second bias transistor having a control terminal connected to a junction between the first and the second resistor.