This paper reports a 1.5-V bootstrapped pass-transistor-based Manchester carry chain circuitsuitable for implementing low-voltage carry look-ahead adders. As verified by the experimentallymeasured data from a test chip fabricated using a 0.8-μm single-poly double-metal CMOStechnology, with the bootstrapped pass-transistor-based Manchester carry chain circuit technique,the speed performance of a 16bit carry look-ahead adder circuit is enhanced by 56 at a supplyvoltage of 1.5 V as compared to the adder using the conventional Manchester carry chain circuit.
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