Design a PLL system starting from basic foundation blocks or from a family of reference architectures. Simulate and analyze the PLL system to verify key performance metrics until you meet the system specifications.
You can start by providing the specifications and impairments of each foundation block and connect the blocks to model different PLL architectural models (bottom-up approach). Alternatively, you can start from complete system-level models of typical PLL architectures and customize those models until to meet your system specifications (top-down approach).
Use Measurements and Testbenches throughout the design process to verify the specifications of the blocks and of the entire system in presence of imperfections.
|Charge Pump||Output a current proportional to the difference in duty cycle between two input ports|
|Loop Filter||Model second, third, or fourth order passive loop filter|
|PFD||Phase/frequency detector that compares phase and frequency between two signals|
|VCO||Model voltage controlled oscillator|
|Single Modulus Prescaler||Integer clock divider that divides frequency of input signal|
|Dual Modulus Prescaler||Integer clock divider with two divider ratios|
|Fractional Clock Divider with Accumulator||Clock divider that divides frequency of input signal by fractional number|
|Fractional Clock Divider with DSM||Delta Sigma Modulator based fractional clock divider|
|Fractional N PLL with Accumulator||Frequency synthesizer with accumulator based fractional N PLL architecture|
|Fractional N PLL with Delta Sigma Modulator||Frequency synthesizer with delta sigma modulator based fractional N PLL architecture|
|Integer N PLL with Dual Modulus Prescaler||Frequency synthesizer with dual modulus prescaler based integer N PLL architecture|
|Integer N PLL with Single Modulus Prescaler||Frequency synthesizer with single modulus prescaler based integer N PLL architecture|
This example shows how to design a simple PLL using a reference architecture, and validate the PLL using PLL Testbench.