Patent ID: 7095281

Claim:
A differential amplifier arrangement comprising: a current regulating circuit having a first and second control signal input terminals and a first signal output terminal; a DC current source; a first controllable path having a first terminal coupled to the DC current source and a control terminal coupled to the first signal input terminal; a second controllable path having a first terminal coupled to the DC current source and a control terminal coupled to the second control signal input terminal; a first load coupled by a first terminal via a first cascode circuit to a second terminal of the first controllable path and coupled by a second terminal to a supply potential; a second load coupled by a first terminal via a second cascode circuit to a second terminal of the second controllable path and coupled by a second terminal to the supply potential; a first tap between the first load and the first cascode circuit that is connected to the signal output terminal; a second tap between the second load and the second cascode circuit; a comparison mechanism having first and second inputs that outputs a control signal according to signals present on the first and second inputs, wherein the first input is coupled to the first tap and the second input is coupled to the second tap and the second input is operable to receive a reference signal; a regulable current source regulated by the control signal from the comparison mechanism having its current output connected to a second terminal of the first controllable path.