A 900 MHz LC-Oscillator with Q...

LC-OscillatorA 900 MHz LC-Oscillator with Quadrature Outputs in 1m CMOS
Ahmadreza Rofougaran Jacob Rael Maryam Rofougaran Asad Abidi Integrated Circuits & Systems Laboratory Electrical Engineering Department University of California, Los Angeles

isscc96 1

Outline
Requirements for local oscillator Phasing method Oscillator Implementation Coupled oscillator for quadrature phases Phase noise Conclusions

isscc96 2

Local Oscillator for Wireless Transceiver
Variable frequency Large voltage swing to drive mixers Low power dissipation and low voltage operation (3.0 v) Precise quadrature outputs for single sideband applications Low phase noise

LO LO Phase noise produces adjacent Phase noise degrades receiver sensitivity due to reciprocal mixing channel interference in the transmitter

isscc96