Browsing by Author "Liang, Ching-Piau"

Now showing 1 - 2 of 2

A wideband CMOS mixer with feedforward compensated differential transconductor
(2007)
Rao, Pei-Zong
;
Chang, Tang-Yuan
;
Liang, Ching-Piau
;
Chung, Shyh-Jong
;
電信工程研究所
A 2.4 to 10.7 GHz wideband mixer for multi-band orthogonal frequency division multiplexing ultra-wideband (MB-OFDM UWB) applications is designed using a TSMC 0.18 mu m CMOS technology. The designed mixer uses a LC folded cascode structure and a feedforward compensated high-linearity differential transconductor to improve the linearity. The measured results reveal that the proposed mixer achieves power conversion gain of 3.3 +/- 1.5 dB, third-order input intercept point (IIP3) of 6.9 dBm, and input l-dB compression point (P-1dB) of -2.8 dBm in the power consumption of 14.4mW from a 1.8V power supply. The chip area is 0.70 x 0.58 mm(2).
Cascode feedback amplifier combined with resonant matching for UWB system
(2007)
Rao, Pei-Zong
;
Cheng, Yuh-Chuan
;
Liang, Ching-Piau
;
Chung, Shyh-Jong
;
電信工程研究所
This paper shows the design of a broadband single-end low noise amplifier for UWB system with TSMC 0.18 mu m. CMOS processes. The proposed amplifier achieves broadband input matching by cascode feedback topology with parallel resonate cavity and the bandwidth is from 3.1 GHz to 10.1 GHz. The simulation results are as follows: 12 I dB of gain, the input/output return loss are greater than 10 dB, minimum noise figure is about 3.3 dB, and 1 dB gain compression point is about -15 dBm. The total current consumption included bias network is 9.1 mA under a 1.8 V single supply voltage. Chip area is 0.8 nun x 0.8 mm.