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A dynamic 4∶1 divider suitable for mm-wave frequency synthesizers is presented. Periodical injection technique is utilized to improve high frequency performance of the divider. The center frequency of the divider can be tuned through biasing to cover wide locking range. Simulation results show that the division frequency is improved 3 GHz with the proposed periodical injection technique. The maximum...
A fully integrated 1.8 GHz CMOS power amplifier is presented in this paper. The proposed power amplifier consists of a three-stage cascade structure comprising a driver stage, a pre-distortion stage, and a power stage. The pre-distortion stage involves the use of two diode connected MOSFETs as a non-linearity generator to expand the 1dB compression point (P1dB) and enhance the power added efficiency...
This paper presents the design of a constant bandwidth gain-linear PGA with current density constant technique (CDCT). It consists of variable Gm cell, variable current source, current shunt circuit and active load. The gain can be changed by using digital controls, and the PGA bandwidth are independent of the gain setting by using CDCT; The PGA is designed in TSMC 0.13µm CMOS process. The PGA features...
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