An accurate analog delay circuit (.PDF)

There are several ways to introduce an analog delay into a signal channel. If you have enough room in your product, an appropriate length of coax cable can be introduced. Inductor-capacitor delay lines can be purchased. My preference is to create the delay with active circuitry, which doesn’t take up much space and can be designed to precisely implement whatever delay time is needed. This approach could even be made voltage-adjustable since there’s only a single resistor and capacitor controlling the delay line...

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