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This paper presents a novel merged circuit which can be used in wireless transmitter. This circuit joins up-conversion mixer and voltage controlled oscillator (VCO) together. The block plays an important role in a transmitter. The design is single-end input and output which can be applied to a communication system with 50ohm antenna directly. The proposed design adopts current reuse and matching work...
A 0.18um reconfigurable multi-band CMOS power amplifier (PA) is presented in this paper. The PA can operate at GSM, GPS and WLAN bands simultaneously or individually by using the reconfigurable matching network. This PA exhibits high performance including up to 29 dB power gain, 28 power-added efficiency and less than 50 mW power consumption under 1.8 V power supply
A 0.18um CMOS Reconfigurable Multi-band Multi-gain LNA is presented in this paper. The LNA can operate at GSM, GPS and WLAN bands simultaneously or individually by using the programmable switches. This LNA exhibits high performance including up to 19 dB voltage gain, 1.9–4.5 dB noise figure and less than 30 mW power consumption under 1.8 V power supply.
A high efficiency, linear, adaptive radio frequency (RF) power amplifier (PA) is presented. The working frequency is about 900MHz. The circuit employs a self-bias cascode for a higher performance and an adaptive bias to enhance linear and efficiency of the PA as well. This power amplifier is designed with the SMIC 0.18um CMOS RF process. The power supply is 1.8V. The simulation results show that the...
A low-voltage CMOS linear power amplifier (PA) is presented for 2.4 GHz ISM-band short range wireless communication in this paper. All the inductors in the circuit are bonding-wire inductors and the capacitors are MIM capacitors. A novel adaptive biasing is used at the output stage, which dramatically increases the linear output power range as well as decreases the power dissipation at lower output...
Now most applications of vision guided robotic systems are in workspaces where the environments are strictly controlled. The vision system and the manipulator should be precisely calibrated before the system works. In this paper, a control structure combining an active vision system and a manipulator is proposed to simulate the mechanism of a man grasping a target. The binocular active eyes track...
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