18 lines
644 B
Plaintext
18 lines
644 B
Plaintext
This directory contains a mixed mode pll, combining
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ngspice and XSPICE circuit blocks.
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The pll consists of the following blocks:
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voltage controlled oscillator: vco_sub.cir
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digital divider and frequency reference: pll-xspice.cir
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phase frequency detector: f-p-det-d-sub.cir
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loop filter: loop-filter.cir
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main simulation control: pll-xspice.cir
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Two test files are included:
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test-vco.cir simulates vco frequency versus control voltage
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test-f-p-det.cir simulates the phase frequency detector and the loop filter.
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The main building blocks are organised as subcircuits.
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main simulation control with three reference frequencies:
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pll-xspice-fstep.cir
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