Design of an IR-UWB transmitter with adaptive PSD in 0.02–1.4 Gpps

An adaptive on-off keying (OOK) impulse radio Ultra Wideband (IR-UWB) transmitter based on shaping filter is proposed in 180 nm TSMC CMOS technology. The adaptivity of the power spectral density (PSD) of the output UWB pulse is obtained by a limited monocycle precharge (LMPC) technique and phase/frequency detector (PFD). The results of post layout simulation show that the PSD peak value is kept closely below the EIRP limit (−41.3 dBm/MHz) in 0.02–1.4 Gpps with only the variation of 3.38 dBm/MHz. The overall power consumption of transmitter including all the circuits at pulse repeating rates of 10, 100, 500, and 1400 Mpps is only 0.293, 0.6235, 0.792, and 2.022 mW, respectively. The active circuit area excluding bonding pads and STG pads is only 0.38 mm2.

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