Low Power VCO and Mixer for Computing Miracast and Mobile Bluetooth Applications

Abstract

A new fully integrated, low power voltage controlled oscillator and divider for Bluetooth and Miracast application are presented. The power consumption use charge recycling technique to reduced current from the divider. This circuit was implemented in 0.18 um CMOS technique with 1.8 V supply voltage. The broadband CMOS double-balance mixer for RF receiver is presented. The broadband mixer is fabricated with the 0.18 μm CMOS process. Measurement of the CMOS mixer is performed; input return loss is higher than 8.5 dB. For VCO with divider measured results indicate the frequency is tunable from 1.91 GHz to 2.07 GHz, corresponding to 13 %. The phase noise of the VCO operating at 2 GHz is -116.8 dBc/Hz at 1 MHz offset, while the VCO draws 2.61 mA and 4.7 mW consumption at frequency band from a 1.8 V supply. Including pads. The output power is -15.85 dBm with 50- O termination at the frequency o f of 2 GHz and the calculated FOM (figure of merit) is -176.