and the PLL outputs a square wave that’s synced to the input, but at a higher frequency. It works by having a voltage-controlled oscillator (VCO) inside, and driving the VCO with a voltage ...

Excluding the block marked Δ Σ (Delta-Sigma) Modulator, this PLL is same as a conventional PLL. A Phase-Frequency Detector (PFD, including a charge pump) compares a divided version of the VCO clock ...

the SNR of an ADC clocked by this PLL is limited to 8b at just over 100MHz and to 14b at just under 2MHz. So, high speed and high resolution ADCs require precise PLLs. Short Term Jitter, Long Term ...

The hardware is relatively straightforward; an SI5351 clock generator provides the reference for an ADF4351 PLL and VCO, which in turn feeds a PE4302 digital attenuator. It’s all driven from an ...