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Noise / White / Pink Noise Generation Circuits
Last Updated on:
Saturday, October 24, 2009 08:14 AM

Circuits Designed by Dave Johnson, P.E. :
  • AUDIO FREQUENCY DIGITAL NOISE GENERATOR
    When you need to test an audio circuit with broadband noise, this circuit works great. It uses just three inexpensive C-MOS ICs that generate a series of output pulses whose widths vary randomly. I included a level control pot.

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
1/f Noise Characteristics Influencing Phase Noise 5/17/00  - Application Note California Eastern Laboratories Doc #909  (app note added 6/06)
A Broadband Random Noise Generator - DN70  Design Notes (Linear Technology) (app note added 1/06)
AN-104: Noise Specs Confusing? - National Semiconductor Application Note  (app note added 2/06)
Audio Frequency Digital Noise Generator - When you need to test an audio circuit with broadband noise, this circuit works great. It uses just three inexpensive C-MOS ICs that generate a series of output pulses whose widths vary randomly. I included a level control pot. ….(designed by David A. Johnson)
Audio noise generator drives earphones or small speaker  - This is a circuit that generates white noise, rolled-off to drive earphones or a small speaker. White noise creates is a "rushing" sound, which sounds something like air rushing by your ear(s). White noise would be flat with frequency, and since this circuit rolls off within the audio range, I refer to it as "rolled-off" noise. White (or rolled-off) noise....  (circuit added 6/07)

Broadband Random Noise Generator - DN70  Design Notes (Linear Technology) (app note added 1/06)
DSP technique generates arbitrary noise - 10/13/94 EDN-Design Ideas: (design idea added 2/06)
Make Noise with a Pic - 08/07/03 EDN-Design Ideas: Building a stable noise generator for audio-frequency purposes requires only a few components. The circuit in Figure 1 relies on linear-feedback shift registers and some simple software. An eight-pin Microchip (www.microchip.com)PIC12C508 controller (IC2)with a short program generates pseudorandom noise at its output pin, GP0.....(design idea added 10/03)
Noise Enhancer Adds Short Noise Pulses - 11/11/96 EDN-Design Ideas: (design idea added 3/03)
Noise generator - Sometimes there is a need for a noise generator: this will work well in the audio range and, without the 680pF capacitor, will extend in the radio frequency range up to 20-30MHz. Voltage output may vary from 1Vpp to several volts depending….(added 9/07)
Noise Specs Confusing? - National Semiconductor Application Note  (app note added 2/06)
Noisemaking Circuits (police siren & chime) - (added 08/08/08)
Pink Noise Generator for Audio Testing (Aaron Cake) - For loudspeaker and room acoustics testing  ((circuit / schematic design added 8/03)
Pseudonoise Generator Doubles its Speed - 12/22/94 EDN-Design Ideas: (design idea added 3/03)
Random noise generator - (electronic circuit added 4/05)
Single IC forms pseudorandom noise source - 03/21/02 EDN-Design Ideas: Trying to find a single IC noise source can be frustrating. National Semiconductor once made such a noise source for audio applications, but it's now hard to find. This situation leaves the designer with several choices, most of which involve using several ICs. You can take the.....(design idea added 1/05)
Spectrum Analyzer Measurements & Noise - Aligent App Note  (app note added 6/07)
White & Pink (1/F) Noise Source - (electronic circuit added 7/03)
White noise generator has no flicker noise component - 03/20/08 EDN-Design Ideas: A white-noise generator with no flicker noise proves useful for testing circuits with an extended low frequency response.....(design idea added 09/08)
Wideband AGC Amplifier as a Differential Amplifier - National Semiconductor Application Note 10-Apr-2000 / (app note added 2/03)

 
 
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