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Simple Circuit Squarewave Generator - Three switchable frequencies: 100Hz, 1KHz, 10KHz 1.5V battery operated, minimum parts counting __ Contact Flavio Dellepiane, fladello @ tin.it Square Wave Oscillator - It has adjustable (and settable) frequencies from 1Hz to 100kHz and is an ideal piece of Test Equipment. __ 555-Timer
Square Wave Oscillator - In this page, I introduce the square wave oscillator which used the Schmitt inverter circuit which was made with the CMOS
. The Schmitt inverter circuit has the hysteresis characteristic. The circuit to introduce is the oscillation circuit which used this characteristic. By the hysteresis characteristic, the voltage which becomes the H level with the input voltage of the inverter rising from 0 V (Voltage that the output becomes 0 V) and the voltage which becomes the L level, descending from +5 V (Voltage that the output becomes +5 V) are different. __ Designed by Seiichi Inoue
Square Wave Oscillator - A very basic square wave generator using a CMOS
4011 NAND gate __ Designed by Andy Collison
Square wave oscillator (2) - I introduce the square wave oscillation circuit which used the CMOS
inverters in this page. This circuit is the circuit which is often used by the following reason. __ Designed by Seiichi Inoue
Square wave oscillator using 555 timer chip - This project is a piece of test equipment. It's a square wave oscillator with 6 selectable frequencies from 1Hz to 100kHz, incrementing in decade values. It's most useful application is as a Signal Injector for radios and TV's. A square wave is the most suitable for testing the IF (Intermediate Frequency) strip as the signal will pass through the IF transformers without any attenuation, no matter what __ Designed by Collin Mitchell
Square Wave to Triangle Wave Converter - This circuit converts a square waveform to a triangle waveform while automatically maintaining a constant triangle amplitude for a wide range of input frequencies. Although originally designed for application in a communications system, the idea is readily adaptable for certain electronic music applications where waveform conversion is desired. Operation is as follows: Transistor Q2 provides a square wave at its collector that has an amplitude controlled by Q1
. __ Designed by Arthur Harrison
Squarewave Generator - Three switchable frequencies: 100Hz, 1KHz, 10KHz 1.5V battery operated, minimum parts counting __ Contact Flavio Dellepiane, fladello @ tin.it
Square-wave Modulator has variable frequency & pulse width - 08/08/02 EDN-Design Ideas - A few years ago, I worked at a disk-drive company. We had a plating facility that required square waves to drive the high-voltage plating operation. The challenge was that the square wave's pulse width had to be variable, along with the duty cycle. Also, the amplitude of the pulses had to be adjustable Design by Michael Fisch, Agere Systems, Longmont, CO
SwOpAmp Makes Square-wave Generator - 02/15/96 EDN-Design Ideas - A simple technique provide as phase compensation for the oscillator in Figure 1a. In this circuit, a tungsten lamp regulates the amplitude of a crystal bridge oscillator. This type of oscillator produces a very low-distortion output at a very stable frequency. The op amp must have a Design by Jim Todsen, Burr-Brown Corp Tucson, AZ
Ten-Second Ultra Lower Power Oscillator - This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery. It is highly stable under varying temperature and supply voltages. . . Circuit by David Johnson P.E.-May, 2000
Triangle & Square Wave Generator - Here is a simple triangle/squarewave generator using a common 1458 dual op-amp that can be used from very low frequencies to about 10 kHz. The time interval for one half cycle is about R*C and the outputs will supply about 10 milliamps of current. Triangle amplitude can __ Designed by Bill Bowden
Triangle / Square wave generator - Transistor Q1, a 2N3563, and its associated components form an oscillator circuit that will oscillate if, and only if, a good crystal is connected to the test clips. The output from the oscillator is then rectified by the 1N4148 signal diode and filtered by C3, a 100pF capacitor. __ Designed by Izhar Fareed
Ultra Lower Power Oscillator - This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery. It is highly stable under varying temperature and supply voltages. . . Circuit by David A. Johnson P.E.-May, 2000
VCO from CMOS
Schmitt Trigger IC - By changing the supply voltage fed to a classic 4584 Schmitt trigger type oscillator, the oscillator frequency can be changed over a range of 50:1. A 74HCU04 inverter is used at the output of the 4584 to maintain a constant TTL logic level signal . . . Hobby Circuit designed by David A. Johnson P.E.-March, 2002
Very Low Power Astable Multivibrator - This classic circuit draws only 200 nanoamps from a 1.5v supply. . . Circuit by Dave Johnson P.E.-June, 2000
Very Low Voltage Oscillator Circuit - OK, you may not ever need an oscillator to function using a power supply voltage below one volt, but if you ever do need one, here is one way to do it. Getting any electronic circuit to operate below one volt is a real challenge. Typical silicon bipolar . . . Hobby Circuit designed by Dave Johnson P.E.-October, 2008 |
