Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6944864 | Microelectronics Journal | 2018 | 4 Pages |
Abstract
In an impulse radio ultra-wideband (IR-UWB) system for low-power location-aware sensor networks, the output pulses must meet the FCC spectral emission mask. In addition, to increase battery life, the IR-UWB transmitter must be energy efficient. In this paper, a CMOS ultra-wideband (UWB) transmitter designed using a 0.11-μm process is presented for 6-10â¯GHz applications. To reduce energy consumption, the transmitter adopts a gated voltage-controlled oscillator (VCO) that directly drives 50â¯Î© output impedance. A gated VCO that uses a trapezoidal pulse for on/off gating of the tail current source satisfies the spectrum mask without requiring an additional pulse shaping filter. The active energy consumption is 13.4 pJ/pulse at a pulse repeating frequency (PRF) of 40â¯MHz. The side-lobe rejection performance is more than 30â¯dB.
Related Topics
Physical Sciences and Engineering
Computer Science
Hardware and Architecture
Authors
Yangkyu Park, Ickjin Kwon,