OPTIMIZATION TECHNIQUES FOR SOURCE FOLLOWER BASED TRACK-AND-HOLD CIRCUIT FOR HIGH SPEED WIRELESS COMMUNICATION
Manoj Kumar1 and Gagnesh Kumar2
Department of Electronics & Comm, Vidya College of Engg., Meerut (U.P)
Department of Electronics & Comm, NIT Hamirpur, Hamirpur (H.P)
ABSTRACT
Since the current demand for high-resolution and fast analog to digital converters (ADC) is driving the need for track and hold amplifiers (T&H) operating at RF frequencies. A very fast and linear T&H circuit is the key element in any modern wideband data acquisition system. Applications like a cable TV or a broad variety of different radio standards require high processing speeds with high resolution. The track-and-hold (T&H) circuit is a fundamental block for analog-to digital (A/D) converters. Its use allows most dynamic errors of A/D converters to be reduced, especially those showing up when using high frequency input signals. Having a wideband and precise acquisition system is a prerequisite for today’s trend towards multi-standard flexible radios, with as much signal processing as possible in digital domain. This work investigates effect of various design schemes and circuit topology for track and-hold circuit to achieve acceptable linearly, high slew rate, low power consumption and low noise
KEYWORDS
Track and Hold Circuit, Low Power Consumption, Slew Rate, Peak Power, Sampling Switch, Flash
Analog to Digital Converter
Original Source Link : http://aircconline.com/vlsics/V2N1/2111vlsics05.pdf
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