TY - JOUR
T1 - Compact CMOS 2 V low-power direct-conversion quadrature modulator merged with quadrature voltage-controlled oscillator and RF amplifier for 1.9 GHz RF transmitter applications
AU - Kao, Hong Sing
AU - Wu, Chung-Yu
PY - 2000/1/1
Y1 - 2000/1/1
N2 - A compact 2 V CMOS low-power direct-conversion quadrature modulator merged with quadrature voltage-controlled oscillator (VCO) and RF amplifier for 1.9 GHz RF transmitter applications is described. The circuit is implemented by using 0.35 μm DPTM CMOS technology and dissipates only 19 mW under 2 V power supply voltage. The low power operation is enabled by the current reuse technique used among quadrature modulator, quadrature VCO, and RF amplifier. Due to small signal path mismatch, the unwanted lower sideband is below -50 dB when the 0 dB normalized desired upper sideband is set at 1.97 GHz. Moreover, the LO feedthrough, second-order intermodulation, and third-order intermodulation are less than -50 dB. The tuning range of the quadrature VCO is 270 MHz from 1.95 GHz to 2.22 GHz.
AB - A compact 2 V CMOS low-power direct-conversion quadrature modulator merged with quadrature voltage-controlled oscillator (VCO) and RF amplifier for 1.9 GHz RF transmitter applications is described. The circuit is implemented by using 0.35 μm DPTM CMOS technology and dissipates only 19 mW under 2 V power supply voltage. The low power operation is enabled by the current reuse technique used among quadrature modulator, quadrature VCO, and RF amplifier. Due to small signal path mismatch, the unwanted lower sideband is below -50 dB when the 0 dB normalized desired upper sideband is set at 1.97 GHz. Moreover, the LO feedthrough, second-order intermodulation, and third-order intermodulation are less than -50 dB. The tuning range of the quadrature VCO is 270 MHz from 1.95 GHz to 2.22 GHz.
UR - http://www.scopus.com/inward/record.url?scp=0033716191&partnerID=8YFLogxK
U2 - 10.1109/ISCAS.2000.858864
DO - 10.1109/ISCAS.2000.858864
M3 - Conference article
AN - SCOPUS:0033716191
VL - 4
JO - Proceedings - IEEE International Symposium on Circuits and Systems
JF - Proceedings - IEEE International Symposium on Circuits and Systems
SN - 0271-4310
Y2 - 28 May 2000 through 31 May 2000
ER -