A new technique for realizing CMOS digitally-controlled decibel-linear variable gain amplifier (VGA) circuits is described. CMOS VGA circuits employing the proposed technique are then given. Besides ...

We describe an all CMOS variable gain amplifier (VGA) suitable for use in disk drive read channels. The VGA maintains a 3 dB bandwidth greater than 85 MHz throughout its gain range. This ensures good ...

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