SDAA225A January   2026  – April 2026 LMX2594

1.   1
2.   Abstract
3.   Trademarks
4. 1Introduction
5. 2VCO Basic Theory and Key Factors
   1. 2.1 VCO
   2. 2.2 VCO Frequency Range
   3. 2.3 Phase Noise
6. 3CMOS LC VCO Design
   1. 3.1 PLL Structure
   2. 3.2 LC VCO Structure and Operation
   3. 3.3 Each Circuit and Block Operation
      1. 3.3.1 Tuning Varactor Bias Circuit
      2. 3.3.2 7 Bit MIM Capacitor Bank
   4. 3.4 Simulation
   5. 3.5 Implementation and Measurement Results
      1. 3.5.1 Layout
      2. 3.5.2 Fabrication and Measurement Results
7. 4Summary
8. 5References
9. 6Revision History

VCO Design Basic and Key Parameter for GSM Application