N Bit Sampling Half Flash Analog to Digital Converter Using Only 2N/2 Comparators
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28
This circuit could cover the middle range of analog-to-digital converters (ADCs):6 or 8 or 10 bits (with careful design). It offers a good trade-off performance versus power consumption or size. As an example, an 8-bit ADC operates at 1 MHz sampling rate, power consumption is below 50 m W (worst case with a reference voltage), and a size smaller than 2 mm2 . So, such an ADC is faster than a successive approximation ADC; of course, it is slower than a full flash or a sub ranging ADC, out size and power consumption are much smaller.