A high-speed and small-area power and resolution adaptive flash ADC is presented. The High-speed Power and Resolution Adaptive ADC (HSPRA-ADC) utilizes an encoder design which significantly improves its speed and minimizes the chip area over the earlier design. Moreover, the ADC also achieves lower power consumption compared to the earlier design. The HSPRA-ADC enables exponential power reduction with linear resolution reduction. The unused parallel voltage comparators are switched to the standby mode during which they consume only the leakage power. The HSPRA-ADC was designed and simulated using 0.18 p n and 0.07 p n CMOS technologies. The HSPRA-ADC is desirahle in wireless mobile applications. 0-7803-8445-8

A new power and resolution adaptive flash ADC, named PRA-ADC, is proposed. The PRA-ADC enables exponential power reduction with linear resolution reduction. Unused parallel voltage comparators are switched to standby mode. The voltage comparators consume only the leakage power during the standby mode. The PRA-ADC, capable of operating at 5-bit, 6-bit, 7-bit, and 8-bit precision, dissipates 69 mW at 5-bit and 435 mW at 8-bit. The PRA-ADC was designed and simulated with 0.18 µm CMOS technology. The PRA-ADC design is applicable to RF portable communication devices, allowing tighter management of power and efficiency.

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A new power and resolution adaptive flash ADC, named PRA-ADC, is proposed. The PRA-ADC enables exponential power reduction with linear resolution reduction. Unused parallel voltage comparators are switched to standby mode. The voltage comparators consume only the leakage power during the standby mode. The PRA-ADC, capable of operating at 5-bit, 6-bit, 7-bit, and 8-bit precision, dissipates 69 mW at 5-bit and 435 mW at 8-bit. The PRA-ADC was designed and simulated with 0.18 µm CMOS technology. The PRA-ADC design is applicable to RF portable communication devices, allowing tighter management of power and efficiency.