By switching the disable input of the op amp at a reference frequency and lowpass-filtering its output, you can obtain a dc voltage proportional to the phase difference of the switching frequency and the input frequency

AuthorsW Bruce Warren
Main DocumentArticle «Switched-gain op amp serves as phase detector or mixer»
DescriptionFigure 1
File Format / SizePDF / 27 Kb
Document Languageenglish

By switching the disable input of the op amp at a reference frequency and lowpass-filtering its output, you can obtain a dc voltage proportional to the phase difference of the switching frequency and the input frequency