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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) |
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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) |
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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) |
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20MHz Function Generator 2 - MAX038 0.1Hz, 20MHz ….(electronic schematic added
11/08) |
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20MHz Function Generator 3 - Uses MAX038 IC to provide 0.1Hz, 15MHz
sinusoidal, square and triangle frequency. ….(electronic schematic added 11/08) |
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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) |
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68HC11 Function Generator - (circuit added 7/02) |
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68HC11 Instruction Halts External RC Clock - 04/27/95 EDN-Design Ideas:
(design idea added 6/06) |
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8038 Function Generator - Produces sine, square and triangle waves from 20Hz
to 200kH (circuit added 8/06) |
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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) |
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AN-285: Function Generator & Linearization Circuit using the AD7569 - AN-285
Analog Devices Application Notes (app note added 6/06) |
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AN-322: Improve Function Generators with Matched D/A Converters - AN-322
Analog Devices Application Notes (app note added 6/06) AD7528 Dual
8-Bit CMOS Multiplying DAC Makes Function Generation Practical and Affordable |
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Function Generator & Linearization Circuit using the AD7569 - AN-285 Analog
Devices Application Notes (app note added 6/06) |
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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) |
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Function Generator (Luhan Monat) - 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) |
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Function Generator aldinc - Circuit Ideas for Designers Application Notes
Advanced Linear Devices, Inc. (app note added 6/06) |
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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.….(circuit design added 08/08) |
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Generating Low Duty-Cycle Pulses with a Function Generator (5988-7507EN): Aligent
Application Note (added 2/06) - Aligent Application Note 1407
(added 4/08) |
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How to Connect Two or More Signal Generators to Create a Multi-Channel Waveform
Generator - Agilent Application Note (added 4/08 |
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How to Generate Low Duty Cycle Pulses with a Function Generator - Agilent
Application Note (added 6/06) |
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Improve Function Generators with Matched D/A Converters - AN-322 Analog
Devices Application Notes (app note added 6/06) AD7528 Dual 8-Bit CMOS
Multiplying DAC Makes Function Generation Practical and Affordable |
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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) |
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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) |
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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)) |
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Program Turns PC Sound Card into a Function Generator - 09/02/99 EDN-Design
Ideas:.....(design idea added 6/06) |
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Timers Generate Variable Sweep Frequencies - 08/01/96 EDN-Design Ideas:
(design idea added 3/03) |
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Using a Function Generator to Create Pulse Width Modulation PWM Waveforms -
Agilent Application Note (added 6/06) |
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Using a Function/Arbitrary Waveform Generator to Generate Pulses - Agilent
Application Note (added 6/06) |
