Publication: Qvco on chip and on pcb measurement
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Date
2008-05-01
Authors
Sukumaran, Ganeshan
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Abstract
A Voltage-Controlled Oscillator (VCO) is designed to tune the in-phase output signals. Quadrature VCO (QVCO) is capable of generating a controlled output response both in phase and out of phase. A Quadrature VCO leads the preference rather than VCO due to increase on chip integration and the relaxation of power hungry, highly attenuated RC-CR ladder network. Today, the evolution of electronics has brought sophisticated equipments and tools to do the testing and measurement to get the best and accurate result. The testing and measurement of the chip and packaged chip had been performed in the CEDEC Lab. The QVCO on chip testing has a power consumption of 113.40 mW with the Idd current of 63.0 mA. The QVCO on PCB measurement has a power consumption of 122.31 mW with the Idd current of 67.95 mA. No result for phase noise, tunability and output carrier power in on chip testing due to improper and insufficient probes to ground and supply the voltage to the circuit. No result for on PCB measurement too, other than power consumption, is due to some small errors on the board that have affected the high frequency output. The supply voltage for the circuit is 1.80V and at the centre frequency of 3.5 GHz.