Triangle Wave Generator Circuits
Last Updated on:
Tuesday, April 01, 2014 04:30 AM 
Circuits Designed by Dave Johnson, P.E. : 


Triangle Signal Generator
A Discover Circuits visitor needed a variable low frequency triangle signal
generator, which would produce a full 5 volts peak to peak signal using a 5v supply.
I suggested the circuit below. It uses three rail to rail op amps (2 LMC6484
dual op amp packages). The first circuit produces a clean 2.5v reference
voltage. The second is configured as a classic multivibrator oscillator, whose
frequency can be changed using a variable resistor.
The
waveform generated across the oscillator timing capacitor is fairly linear and is
restricted to only 1 volt peak to peak. It swings a half volt above and below
the 2.5v reference. The voltage across the capacitor is then amplified by the
third op amp by a factor of 5. The result is a pretty clean triangle signal,
which approaches to within a few tens of millivolts of the supply rails.



Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:

[addjandassoc.htm] 
Frequency Doubler Operates on Triangle Waves  03/14/96 EDNDesign
Ideas.... EDN is migrating links. This link is not verified. Search
the "title" + "EDN" for new link. 
Highfidelity triangle wave generator consumes only 6 µA 
16Oct03 Issue of EDN Ideal triangle waves involve infinite d2V/dt2,
so highfidelity triangle waves entail very high bandwidths. Micropower
circuits have fairly low bandwidth, so generating good triangle waves with
such circuitry becomes problematic. The circuits of Figure 1 show two
methods of generating triangle waves.... [Design Idea by Glen Brisebois,
Linear Technology Corp, Milpitas, CA] 
Precise Triangle Wave Generation  National Semiconductor
Application Notes,28Jun1996 / (app note added 3/03) 
Precision 40kHz Triangle Generator  This circuit generates a
precision 40KHz triangle waveform. (added 7/06) …. [Designed by David
A. Johnson] 


Scheme yields Frequency Locked Triangle Waves  02/02/98 EDNDesign
Ideas....The circuit in Figures 1 and 2 generates frequencylocked triangle waves of
constant amplitude. It uses readily available TTL and other oldertechnology parts.
The circuit portion in Figure 1 comprises the frequency dividers, counters, and
converter. The portion in Figure 2 contains current sources, output circuits,....
[Design Idea by Daniel Dufresne, Decatron, St Bruno, PQ, Canada] 

Summer Linearizes Ramp & Triangle Generators  12/08/94 EDNDesign
Ideas....The ramp generator in Fig 1a and the trianglewave generator in Fig 1b charge
capacitor C1 linearly. The key to the circuits' linearity is an opamp adder that sums
a reference voltage with the voltage on C1. For Fig 1a's ramp generator, the adder
comprises opamp IC1, R4, R5, and associated components.... EDN is migrating links.
This link is not verified. Search the "title" + "EDN" for new link. 
Transconductance amp gives oscillator reciprocal response  17Apr03 Issue
of EDN The circuit in Figure 1 is a variation on the familiar
integrator/comparator trianglewave oscillator, which you typically implement with two
op amps. An integrator and a comparator connect in a positivefeedback loop; the
comparator drives the integrator and vice versa. A fixed amount of hysteresis exists
in the comparator, producing a triangle wave at the integrator's output.... [Design
Idea by Mike Irwin, Shawville, PQ, Canada] 
Triangle Signal Generator 
A Discover Circuits visitor
needed a variable low frequency triangle signal generator, which would produce a full
5 volts peak to peak signal using a 5v supply. I suggested the circuit below.
It uses three rail to rail op amps (2 LMC6484 dual op amp packages). The first
circuit produces a clean 2.5v reference voltage. The second is configured as a
classic multivibrator oscillator, whose frequency can be changed using a variable
resistor. The waveform generated across the oscillator timing capacitor is
fairly linear and is restricted to only 1 volt peak to peak. It swings a half
volt above and below the 2.5v reference. The voltage across the capacitor is
then amplified by the third op amp by a factor of 5. The result is a pretty
clean triangle signal, which approaches to within a few tens of millivolts of the
supply rails. [Circuit of the Week designed by David A. Johnson, P.E.] 
Triangle & Square Wave Generator  Here is a simple triangle/squarewave
generator using a common 1458 dual opamp 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.... 
TriangleWaveform Generator (Randy LinscottO  The TriWaveform Generator
can be used for a number of different uses. The one that I use it for is a signal
generator to test circuits. The frequency range is 20 to 20khz. and can be adjusted by
R1. The duty cycle or the time that the waveform is high ….(electronic circuit added
4/05) 


Triangle Wave
Generator Circuits
Last Updated on:
Tuesday, April 01, 2014 04:30 AM 

