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A Frequency-to-voltage converter (FVC) for use in a system for feedback linearization of VCOs is presented. The VCO linearization is intended for use in an ADC application where high resolution, low power consumption, and low voltage operation is required. These requirements places stringent demands on the performance of the FVC. The proposed implementation of the FVC is a good fit for digital CMOS...
An LC-tank oscillator for ultra-low-power narrow-band applications is designed using a switched capacitors tuning implementation in a 9-layer-metal 90 nm RF CMOS technology. The oscillator is targeted for 900 MHz and 2.4 GHz ISM bands operation with external inductors. The design resulted in a flexible and digitally controllable oscillator core that can be used with both external and planar integrated...
A 5 GHz dual-path integer-N PLL uses an LC VCO and softly switched capacitors in the integral path to extend the fine-tuning range while keeping KVCO low. The loop BW is 80 kHz, the reference spur level is Lt -70 dBc with a 1MHz reference frequency and total loop filter capacitance of 31 pF. The measured phase noise is Lt -78 dBc/Hz and -115 dBc/Hz at 10 kHz and 1MHz offsets, respectively. This 0...
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