Metal. detector. If the VCO output in a phase-locked loop is phase shifted and taken back to the input, the loop locks to itself and runs at whichever frequency ... This principle is used to make a metal detector here, but has many applications in measurement systems. ... Simple metal detector using a PLL locked to itself.
Title | : | Newnes Circuit Ideas Pocket Book |
Author | : | |
Publisher | : | - 1995* |
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