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Submitted by: Chirag Patel Ravi Vachhani Vijay Sankar DESIGN OF A  PHASE LOCKED LOOP FOR  GSM 900
Specifications: Input Frequency:  200 – 220 MHz Supply Voltage: 3.3V DC Technology used: 0.25 μm CMOS Output Frequency Range: 800 - 900 MHz Settling Time: <10us
General block diagram A Phase Locked loop (PLL) is a system which generates an output signal which is synchronized in frequency and phase to an input signal.
Phase Frequency Divider schematic
PFD SIMULATION Case 1 :Ref2 leading Ref 1
PFD SIMULATION Case 2 : Ref 1 leading Ref 2
PFD SIMULATION Case 3 : In phase response
Charge Pump- Schematic
Charge Pump Simulation
Frequency Divider ( by 4) Schematic
Frequency Divider ( by 4)
VCO LC Oscillator
VCO Tuning Range
VCO Output
PLL
PLL Output
Layout
Things done : Schematics, Simulation and Layout of all  individual blocks. DRC and LVS of all blocks. Things to do : Complete Layout of the entire system. LVS of the entire system Post Layout simulation
References [1] D.K. Shaeffer, A.R. Shahani, S.S. Mohan, H.Samavati, H.R. Rateh, M. Del Mar Hershenson, M. Xu, C.P, Yue, D.J. Eddleman, and T. Lee, “ A 115mW, 0.5-um CMOS GPS receiver with wide Dynamic-Range Active Filters, “ IEEE J. Solid-State Circuits, Vol.33, No.12, pp. 2219-2231, December 1998 [2] R.Best,&quot;Phase-Locked Loops&quot;, McGrawHill. [3] B.Razavi, &quot;Design of Analog CMOS Integrated Circuits&quot;, McGraw-  Hill. [4] F. M. Gardner, &quot;Charge pump phase locked loops&quot; IEEE trans. on communications, Vol.  COM-28, NO.11, Nov 1980. [5] Youngmin Kim, Bo Zhai and Byungwok Min, &quot;Frequency Synthesizer for GPS Radio Application&quot;.[6] Jenkin Chan, Vivian Lee, Amar Basu, “A 1.573-GHz Low power, Wide Locking Range GPS Frequency Synthesizer in 0.18-um CMOS”.

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PHASE LOCKED LOOP FOR GSM 900

  • 1. Submitted by: Chirag Patel Ravi Vachhani Vijay Sankar DESIGN OF A PHASE LOCKED LOOP FOR GSM 900
  • 2. Specifications: Input Frequency: 200 – 220 MHz Supply Voltage: 3.3V DC Technology used: 0.25 μm CMOS Output Frequency Range: 800 - 900 MHz Settling Time: <10us
  • 3. General block diagram A Phase Locked loop (PLL) is a system which generates an output signal which is synchronized in frequency and phase to an input signal.
  • 5. PFD SIMULATION Case 1 :Ref2 leading Ref 1
  • 6. PFD SIMULATION Case 2 : Ref 1 leading Ref 2
  • 7. PFD SIMULATION Case 3 : In phase response
  • 10. Frequency Divider ( by 4) Schematic
  • 15. PLL
  • 18. Things done : Schematics, Simulation and Layout of all individual blocks. DRC and LVS of all blocks. Things to do : Complete Layout of the entire system. LVS of the entire system Post Layout simulation
  • 19. References [1] D.K. Shaeffer, A.R. Shahani, S.S. Mohan, H.Samavati, H.R. Rateh, M. Del Mar Hershenson, M. Xu, C.P, Yue, D.J. Eddleman, and T. Lee, “ A 115mW, 0.5-um CMOS GPS receiver with wide Dynamic-Range Active Filters, “ IEEE J. Solid-State Circuits, Vol.33, No.12, pp. 2219-2231, December 1998 [2] R.Best,&quot;Phase-Locked Loops&quot;, McGrawHill. [3] B.Razavi, &quot;Design of Analog CMOS Integrated Circuits&quot;, McGraw- Hill. [4] F. M. Gardner, &quot;Charge pump phase locked loops&quot; IEEE trans. on communications, Vol. COM-28, NO.11, Nov 1980. [5] Youngmin Kim, Bo Zhai and Byungwok Min, &quot;Frequency Synthesizer for GPS Radio Application&quot;.[6] Jenkin Chan, Vivian Lee, Amar Basu, “A 1.573-GHz Low power, Wide Locking Range GPS Frequency Synthesizer in 0.18-um CMOS”.