A class-B output buffer with threshold voltage (V TH ) compensation for the data driver circuit fabricated on liquid crystal display (LCD) panel in low temperature polysilicon (LTPS) technology is proposed. This output buffer can be operated at 50-kHz operation frequency with a 2-to-8 V output swing for extended graphic array (XGA) application. By employing the design technique of threshold voltage compensation, the offset voltage (V OS ) of the class-B output buffer under 2-to-8 V input signal can be controlled within ± 100 mV for a high resolution and quality applications in LCD panel.

A dual-band microstrip rectenna for wireless local area network (WLAN) applications is presented. It consists of a dual-band dual-polarized receiving antenna and a dual-band high efficiency rectifier. The receiving antenna includes a circular loop, a coplanar waveguide (CPW), and a microstrip line. To minimize mutual interference and ensure high isolation of more than 20 dB between the dualpolarized ports, a CPW is used to produce vertical polarization modes, and the horizontal polarization modes are fed by a microstrip line. The horizontal excitation port is used for information receiving, while the vertical feeding port transfers enough wireless energy for rectifying. A co-simulation of HFSS and ADS is used for analysing the performance of rectenna. Measured results show that it has the −10 dB reflection coefficient bandwidths of 510 MHz (2.39-3.09 GHz) and 920 MHz (5.16-6.08 GHz) for rectifying Port 1, where the isolation between the ports is higher than 25 dB, and the cross polarization is less than −15 dB in two bands. The maximum microwave-direct current (mw-dc) conversion efficiencies of 67.7% and 57.03% at 2.45 GHz and 5.8 GHz are achieved with a 300 Ω load and 16 dBm receiving power.