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Pulse and Digital Circuits by Manmadha Rao G., Rama Sudha K., Venkata Rao K.

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11.5 APPLICATIONS OF SAMPLING GATES

Sampling gates find applications in many circuits. Sampling gates are used in multiplexers, D/A converters, chopper stabilized amplifiers, sampling scopes, etc. Here, the three specific applications of the sampling gates in: chopper stabilized amplifier; sampling scope and time division multiplexer are discussed.

11.5.1 Chopper Stabilized Amplifiers

Sometimes it becomes necessary to amplify a signal v that has a very small dv/dt and that the amplitude of the signal itself is very small, typically of the order of milli-volts. Neither, ac amplifiers using large coupling condensers nor dc amplifiers with the associated drift would be useful for such an application. A chopper stabilized amplifier employing sampling ...

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