An integrated operational amplifier with novel HF behavior

There is a growing demand for integrated operational amplifiers that combine high gain with a large unity-gain bandwidth and a simple frequency compensation. A frequency-compensation technique is described that enables construction of multi-stage amplifiers without introducing compensation problems. The suggested solution is based on the elimination of stages in the high-frequency region, such that in this region only one stage determines the roll-off. A circuit diagram of an integrated operational amplifier with a gain of 15/spl times/10/SUP 3/, a unity-gain bandwidth of 25 MHz, and frequency compensation in accordance with the above principle of elimination is presented.