A 200PS differential CMOS delay element for 10 GHz ultra wideband wireless receivers

Design of a novel selective band delay element and its performance gain over nominal low pass LC ladder based delay element is demonstrated. The delay element uses three 2^nd order all pass filter as its core element and achieves a delay of 200 ± 10 ps within 6.8 GHz to 12.9 GHz range. The circuit is implemented using 130 nm RF CMOS technology. Total area of the circuit is 0.88mm × 0.86mm without bondpad and 0.88mm × 1.06mm with bondpad. The circuit uses only passive elements, thus there is no static power consumption. Maximum dynamic power consumption is found to be 6μW.