SECTION 1-6

High Speed Op Amps

Walt Kester

Introduction

High speed analog signal processing applications, such as video and communications, require op amps that have wide bandwidth, fast settling time, low distortion and noise, high output current, good dc performance, and operate at low supply voltages. These devices are widely used as gain blocks, cable drivers, ADC preamps, current-to-voltage converters, and so forth. Achieving higher bandwidths for less power is extremely critical in today’s portable and battery-operated communications equipment. The rapid progress made over the last few years in high speed linear circuits has hinged not only on the development of IC processes but also on innovative circuit topologies.

The evolution of ...

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