Presentation On CMOS voltage controlled ring oscillator for low power radio transceiver applications

PPT On CMOS voltage controlled ring oscillator for low power radio transceiver applications

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CMOS voltage controlled ring oscillator for low power radio transceiver applications Presentation Transcript:
1.A new CMOS voltage controlled ring oscillator for low power radio transceiver applications

2.Outline
Motivation of works
Existing VCO architecture based ring oscillator
Proposed architecture
 Performance
Comparison with existing system
Conclusion

3.Application of VCO in  Transmitter

4.VCO CLASSIFICATION
Resonant based oscillator
      ( example : LC oscillator)
Wave form based oscillator
     ( example: Ring oscillator)

5.VCO in RF region
Target frequency: 0.9 GHz -2 GHz
Control voltage range: 1.2 -2 V

6.Motivation for choosing ring oscillator for VCO
Less power consumption
    (use of inverter made up of CMOS)
Less area requirement
    ( high packing density of CMOS)
Highly suitable for large scale integration

7.Ring oscillator

8.Proposed architecture

9.Conclusion
oscillation frequency ranging from 0.7- 1.75GHz
 control voltage ranging from 1.2--2V
phase noise ~ -88dBc/Hz at an offset frequency of 1MHz