ngspice

History

h_vogt 6cd13e0475 pll-xspice-fstep.cir: pll with ref frequency steps		2012-07-31 18:05:10 +02:00
..
README	pll-xspice-fstep.cir: pll with ref frequency steps	2012-07-31 18:05:10 +02:00
f-p-det-d-sub.cir	new XSPICE example: mixed mode pll circuit	2012-07-29 13:52:23 +02:00
loop-filter.cir	new XSPICE example: mixed mode pll circuit	2012-07-29 13:52:23 +02:00
pll-xspice-fstep.cir	pll-xspice-fstep.cir: pll with ref frequency steps	2012-07-31 18:05:10 +02:00
pll-xspice.cir	pll-xspice.cir: save command added	2012-07-31 17:31:28 +02:00
test-f-p-det.cir	new XSPICE example: mixed mode pll circuit	2012-07-29 13:52:23 +02:00
test_vco.cir	new XSPICE example: mixed mode pll circuit	2012-07-29 13:52:23 +02:00
vco_sub.cir	new XSPICE example: mixed mode pll circuit	2012-07-29 13:52:23 +02:00

README

This directory contains a mixed mode pll, combining
ngspice and XSPICE circuit blocks.
The pll consists of the following blocks:
voltage controlled oscillator: vco_sub.cir
digital divider and frequency reference: pll-xspice.cir
phase frequency detector: f-p-det-d-sub.cir
loop filter: loop-filter.cir
main simulation control: pll-xspice.cir

Two test files are included:
test-vco.cir simulates vco frequency versus control voltage
test-f-p-det.cir simulates the phase frequency detector and the loop filter.

The main building blocks are organised as subcircuits.

main simulation control with three reference frequencies:
pll-xspice-fstep.cir