Oscillator Circuits

A tone burst sent at the beginning of each transmission is decoded at the receiver by a phase-locked loop (PLL), resulting in an output from pin 3 of a logic gate that activates a carrier-operated switch (COS). In this circuit,...

The oscillator provides an output with high spectral purity while maintaining the typical stability associated with crystal oscillators. The crystal not only sets the oscillator's frequency but also functions as a low-pass filter to eliminate unwanted harmonics and as...

This simple and inexpensive crystal oscillator consists of one-third of a 7404 hex inverter, four resistors, and a crystal. The inverters are biased into their linear regions by resistors R1 to R4, while the crystal provides the necessary feedback....

This circuit operates at or near series resonance. It is a well-designed circuit with no parasitics. It is easy to tune and has good frequency stability. The circuit in question utilizes series resonance to achieve optimal performance. At series resonance,...

The project involves adding a DIY audio oscillator to a home workshop, which is essential for testing audio projects. While a basic oscillator is already available, it lacks a frequency counter. The design follows a schematic that provides a...

When an alternating current signal is applied to a capacitor, the phase of the charging current and the voltage across the capacitor shifts by 90 degrees. Conversely, when an alternating current signal is applied to an inductor, the voltage...