Low Power Folding and Interpolating ADC Using 0.18 mu-m Technology

Folding and interpolating A/D converters have been shown to be an effective means of digitization of high bandwidth signals at intermediate resolution. The paper focuses on design of low power 5-bit folding & interpolating ADC. The folding amplifier can be used to produce more than one zero-crossing point to reduce required number of comparators. The converter is designed using novel low voltage, low power folding amplifier with folding factor=4. The folding amplifier is used in the design of coarse and fine converter both. To reduce the power consumption, encoder based on XOR-OR logic is used. The design is implemented using 0.18mm technology at 1.7V supply voltage.