Clock-Driven Triangle-Wave Generator Circuit
U2-a, 03 and R2 operate as an integrator. Q2 and Q3 are alternately switched at 256 cycles....
Triangle-Wave Generator Circuit
This is a simple triangle-wave generator using two IC devices and a transistor. The triangle wave is used as feedback to the square-wave generator. SI allows r...
Function Generator Circuit
A quad op amp makes up the heart of this function generator. Ul-a generates a square wave, and outputs this to J8. J1 and J2 are pulse outputs obtained by diff...
Function Generator With Lt1016 Circuit
This function generator, based on an LT1016 high-speed comparator, will generate from a single +5-V supply....
Frequency Multiplier Without Pll Circuit
An input rectangular signal is differentiated and short impulses are formed from its edges. These impulses write the content of counter A to a latch that clear...
Wide-Range Crystal Oscillator Circuit
A circuit using one 7400 TTL10 can use crystals of the fundamental type, from 1 to about 13 MHz. Output is rich in harmonics,...
Crystal Tester Circuit
Ql acts as a Colpitis crystal oscillator, and if the crystal under test is operational, the RF signal is rectified by D1 and D2, turning on Q2 and lighting ind...
10 To 1Hz Timebase Circuit
This system uses an MM5369 IC to derive a 60-Hz signal from a TV burst crystal (3579 MHz). F8 and V9 producc a 10-Hz and 1-Hz signal from this 60-Hz signal....
Crystal Activity Tester Circuit
This circuit will check a crystal for activity. Two sections of a 7400 act as an oscillator and its output is rectified and drives an npn transistor that switc...
Crystal Oscillator Circuit
The CMOS amplifier is biased into the linear region by resistor RB. The pi-type crystal network (CI and C2, and XTAL) provides the 180 phase shift at the reson...
Low-Frequency Crystal Oscillator Circuit
Ql, Q2, and the associated circuitry form a modified astable multivibrator in which the loop gain is automatically adjusted to the threshold of oscillation by ...
Sine Wave To Square Wave Converter Circuit
This circuit turns a sine wave into a square wave. It is comprised of a single 2-input NAND Schmitt trigger that`s configured as an inverter with a trigger lev...
One-Chip Crystal-Controlled Converter Circuit
This circuit can work over a wide range of frequencies. XTAL 1 is a fundamental-frequency crystal. Tl and CI are tuned to the input frequency. An application o...
Morse Practice Oscillator Circuit
A 555 timer configured as an astable multivibrator is used in this circuit lo generate an audio note....
Qrp Sidetone Generator Code Practice Oscillator Circuit
For use with low-power transmitters with a positive keying voltage. Q1/Q2/Q3 form a switching amplifier. When the key is pressed, the collector of Q3 goes to g...
Harmonic Generator
This circuit can extract harmonics from various waveforms. With a sloped input waveform, the comparator produces a pulse...
Phase Shifter
This circuit adds 120 degrees of phase shift to a 50- or 60-Hz input, regardless of the frequency and amplitude fluctuations ...
Simple Low-Frequency V/F Converter
In this circuit, CI is charged to a fixed reference level, then discharged. Integrator ICl circuit charg...
Voltage-To-Frequency Converter I
Using a Burr-Brown VFC 32 IC, this voltage-to-frequency converter uses few components. The circuit values ...
Voltage-Tuned Vhf Oscillator
This VHF VCO circuit is suitable for 30 to 200 MHz. Q1 can be replaced by a 2N3563 for operation above 100 MHz...