2nd Order Type 2 PLL for Tracking Frequency Error

1. What are the drawbacks of using a Type I PLL frequency synthesizer with respect to Type II?
2. Which type of filter is used in PLL?
3. What is a Type 1 PLL?
4. What does PLL bandwidth mean?

What are the drawbacks of using a Type I PLL frequency synthesizer with respect to Type II?

The main limitation of Type I PLLs is their limited hold-in range, since a nonzero signal at its input, and thus at the PD output, is required to sustain a frequency different from the VCO free running frequency.

Which type of filter is used in PLL?

PLL with a 5th-order Butterworth filter.

What is a Type 1 PLL?

A PLL is a closed-loop feedback control system that the phase of its output signal is related to the phase of its input signal. Arguably, the simplest PLL is a type-1 PLL. The type-1 PLLs are characterized by having only one integrator in their control loop and, therefore, having a high stability margin.

What does PLL bandwidth mean?

PLL bandwidth is the measure of the PLL's ability to track the reference clock and its associated jitter. Bandwidth is approximately the unity gain point for open loop PLL response.