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Function Generator Circuits
Function Generators:   # -  F        G - Z

Last Updated on: Tuesday, April 01, 2014 04:29 AM


1Hz to 10MHz Sine/Square Function Generator based on the AD9835 & PIC16F628 -  An extremely simple and low cost Sine/Square wave generator based on the Analog Devices AD9835 Direct Digital Synthesis (DDS) Generator chip. The frequency can be set for any frequency from 1Hz to 10MHz in 1Hz resolution steps! All this with three push buttons and a novel "sliding window" LED display. The controller chip is a Microchip PIC16F628. There is no wiring, and the PCB fits into a standard UB3 Jiffy Box. ….(electronic schematic added 11/08)
1Hz up to 22MHz Generator -  This is simple MAX038 generator. It produces sine, triangle and square waves from 1Hz up to 22MHz. The Amplitude, offset and duty cycle are adjustable to offer wide range of generated signals. Frequency adjustment is made as a rotary switch S8 with a capacitor bank and variable resistor P7. Amplitude, offset and duty-cycle are performed via variable resistors. Switch S5 selects generated waveform. The outpud at U1-19 is 2V p-p for all waveforms. For amplitude adjustment, P6 and R38 form a voltage divider. The summing amplifier multiplies that voltage, so the signal at the output will vary up tp 24.4V p-p. The offset voltage is controlled by resistor P5. Duty-cycle adjustment is controlled by resistror P4. ….(design added 11/08)
20MHz Function Generator -  The High Speed Function Generator was published in the professional electronics section of the Aug 1996 issue of Electronics Australia, and has proven to be extremely popular. It is capable of generating 20Mhz Sine, Square, Triangle, and TTL waveforms. ….(electronic schematic added 11/08)
20MHz Function Generator 2 -  MAX038 0.1Hz, 20MHz ….(electronic schematic added 11/08)

20MHz Function Generator 3 -  Uses MAX038 IC to provide 0.1Hz, 15MHz sinusoidal, square and triangle frequency. ….(electronic schematic added 11/08)
20MHz High Speed Function Generator -  The High Speed Function Generator was published in  professional electronics section of  Aug 1996 issue of Electronics Australia, and has proven to be extremely popular.  kit is no longer available from any of  kit suppliers…  (added 11/05)
68HC11 Function Generator -  .....
68HC11 Instruction Halts External RC Clock -  04/27/95 EDN-Design Ideas Using the circuit in Fig 1, a 68HC11 µP's stop instruction can put the µP's external RC-oscillator clock, as well as the µP itself, into a low-power mode. On receiving an interrupt, the µP will exit the stop condition and enable the RC clock. The RC clock, being a low-Q circuit, will start up immediately. Crystal oscillators, on the other hand, can waste precious milliseconds coming up to speed and stabilizing..... [Design Idea by Allen Harstine, Micro Systems Engineering Inc, Lake Oswego, OR]
8038 Function Generator -  Built around a single 8038 waveform generator IC, this circuit produces sine, square or triangle waves from 20Hz to 200kHz in four switched ranges. There are both high and low level outputs which may be adjusted with the level control.  This project makesa useful addition to any hobbyists workbench as well.... [Andy Collison, designer]
8038 Generator -  ICL8038 signal generator chip, manufactured by Intersil. An improved version, made by Exar corp. is available (XR8038A). It can be used to produce three types of waveforms, sine, square and triangle. The frequency, amplitude and duty cycle can be varied, and selection of waveform is done digitally. To further reduce the complexity, a 3-to-1 switch may be used in place of the digital selection circuitry. I made use of the digital selection mechanism because switches available on the market are prone to dirt accumulation and poor contact quality. Besides, the digital method is a lot cooler! ….(electronic schematic added 11/08)
AN-285: Function Generator & Linearization Circuit using the AD7569 -  AN-285 Analog Devices Application Notes.....[App Note]
AN-322: Improve Function Generators with Matched D/A Converters -  AN-322 Analog Devices Application Notes.....[App Note]  AD7528 Dual 8-Bit CMOS Multiplying DAC Makes Function Generation Practical and Affordable
Function Generator -  After the recent demise of our multifunction signal generator, we decided to make one of our own.  The circuit uses a PIC16F870 (about $3), an R/2R resistor ladder network (for a real fast and cheap D/A),  and a few other parts….(added 02/09) [Luhan Monat - Mesa Arizona]
Function Generator & Linearization Circuit using the AD7569 -  AN-285 Analog Devices Application Notes.....[App Note]
Function Generator (Andy Collinson) -  A function generator using the ICL8038 integrated circuit. Is has four ranges and capable of sine, square and triangle outputs…..(electronic design added 6/07)
Function Generator aldinc -  Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.....[App Note]
Function Generator Circuit -  Built around a single 8038 waveform generator IC, this circuit produces sine, square or triangle waves from 20Hz to 200kHz in four switched ranges. There are both high and low level outputs which may be adjusted with the level control.  This project makes a useful addition to any hobbyists workbench as well.….
Generating Low Duty-Cycle Pulses with a Function Generator (5988-7507EN): Aligent Application Note  (added 2/06) -  Aligent Application Note 1407  (added 4/08)
How to Connect Two or More Signal Generators to Create a Multi-Channel Waveform Generator -  Agilent Application Note  (added 4/08
How to Generate Low Duty Cycle Pulses with a Function Generator -  Agilent Application Note  (added 6/06)
Improve Function Generators with Matched D/A Converters -  AN-322 Analog Devices Application Notes.....[App Note]  AD7528 Dual 8-Bit CMOS Multiplying DAC Makes Function Generation Practical and Affordable
Low Frequency Function Generator -  Due to the unavailability of very low frequency function generators and the problems experiencing with them to generate a wave form starting with a particular trigger input has prompted me to design this function generator. The system consists of a personal computer and the printer port is used.....(design idea circuit added 09/08)
MAX038 Function Generator -  This is a function generator that can generates 10Hz through 20MHz in six ranges. Analog output can select one of any wave forms, sine, triangle or square. TTL output can select 50% fixed duty or variable pulse width.  (added 6/06)
Max-038 Signal -  The Max-80 function gernerator IC is specified to work to 20 MHz. So far, this unit works nicely to 50KHz. Since I seldom need signals higher than that, it has taken up a happy ….(electronic schematic added 08/08)) [Luhan Monat - Mesa Arizona]
Program Turns PC Sound Card into a Function Generator -  09/02/99 EDN-Design Ideas  EDN is migrating links. This link is not verified.  Search the "title" EDN for new link.
Sweep your Function Generator -  Function generators built around the XR2206 have always had an excellent price/performance ratio, and the IC although ‘obsolescent’ is still available. If your generator does not have built-in sweep (‘wobbulator’) capability, a small external circuit is all you need….must register on this site.... [Published in Elecktor July/August 2010]
Timers Generate Variable Sweep Frequencies -  08/01/96 EDN-Design Ideas..... EDN is migrating links. This link is not verified.  Search the "title" + "EDN" for new link.
Using a Function Generator to Create Pulse Width Modulation PWM Waveforms -  Agilent Application Note  (added 6/06)
Using a Function/Arbitrary Waveform Generator to Generate Pulses -  Agilent Application Note  (added 6/06)

Function Generators:   # -  F        G - Z



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