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A CMOS Variable Gain Amplifier is described for possible use in disk drive read channels. The 0.9 sq mm cell attains a 30 dB range of variable gain with 50 MHz bandwidth, requires a single 5V supply, and dissipates 150 mW.

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A signal processor incorporates equalization, clock recovery, AGC, and peak detection for waveforms in the disk read channel, and operates up to a 40MHz clock rate. The 2pm CMOS IC uses precision analog MOS signal processing implemented with scaled-down unit cells, and dissipates 500mW from a 5V power supply.

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