Compensated inverting/noninverting differential amplifier

An inverting/noninverting differential amplifier comprising:

• first and second matched transistor pairs each including an interconnected common terminal, an output terminal, and an input terminal to which are provided respective input signals with the input signal provided to the second matched transistor pair being maintained at a constant reference voltage, and wherein said input signals are amplified and provided to respective output terminals;
• third and fourth transistors respectively coupled to said first and second matched transistor pairs and responsive to the amplified input signals produced therein for respectively generating inverted and non-inverted output signals proportional to the difference between said respective input signals, said third and fourth transistors each including a base element coupled to a respective output terminal of said first and second matched transistor pairs, a collector element from which said inverted and non-inverted output signals are derived, and an emitter element coupled in a feedback arrangement to the common terminal of a respective first and second matched transistor pair;
• a resistive network coupling the common terminals of said first and second matched transistor pairs;
• a common output load;
• first and second switch means coupled respectively to said third and fourth transistors and responsive to a switching signal for coupling either the inverted or non-inverted output signal to said common load;
• and
• a coupling capacitor connecting said first matched transistor pair and said fourth transistor for phase compensating said inverted and non-inverted output signals coupled to said common load by varying the phase of said non-inverted output signal to match that of said inverted output signal.