Amplifier Circuits - Audio Amp electronic Schematics, Page 2

Amplifiers: Audio Circuits Page 2
Amplifier -- Main Page Audio Circuits -- Main Page
Audio Amplifiers: #'s - A B-G H-L M-O P-S T-U V-Z
Last Updated on: Friday, March 12, 2010 12:07 PM

Circuits Designed by Dave Johnson, P.E. :

AUDIO AMP + 3KHz FILTER
This circuit is the audio amp section for a complete optical transmitter. The circuit amplifies and filters the voice audio signals from an electret microphone. The circuit is described in more detail in the receiver section of Dave Johnson's Handbook of Optical Through the Air Communications.

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

Balanced Floating Output Stage Circuit - A great output topology based on a design by George D Pontis (circuit design added 08/08/08)

Balanced Low Noise Microphone Preamp - very low noise, close to oretical minimum, high hum rejection and variable gain with a single rotary pot, similar to that used in many professional grade mixing desks (added 8/03)

Battery Powered Electret Microphone - Note: scroll down to this this circuit. This circuit can be used with normal tape recorders and sound cards which usually are designed for dynamic microphones. When you build this circuit inside microphone case (or to small external box) you can make yourself an universal microphone out of an electret capsule. (added 11/05)

Biasing and Decoupling Op Amps in Single Supply Applications - AN-581 Analog Devices Application Notes (app note added 2/06)

Bidirectional 2.4 GHz One Watt Amplifier - (circuit / schematic added 6/03)

Bidirectional 900MHz One Watt Amplifier - This device is a stereo amplifier for a high sensitivity stereo parabolic microphone. It can be used for listening to distant sounds. Typical parabolic microphones are monophonic, this unit has a stereo audio path that helps produce more realistic sounding audio. The Big-E can be used with headphones or as an audio source for a stereo tape recorder.... (added 10/05)

Bidirectional 900MHz One Watt Amplifier qsl - (circuit / schematic added 6/03)

Binaural Mics - (electronic schematic added 8/02)

BJT Current Source - ...(spice design added 02/09)

Boost 3.3V to 5V with Tiny Audio Amplifier - 09/05/02 EDN-Design Ideas / (added 12/04)This charge-pump circuit quietly converts a 3.3V source to 5V at 500 mA (figures 1 and 2). National's (www.national.com) LM4871LD power amplifier makes this design idea both possible and practical, thanks to its low output resistance, low cost, compact size, and high dissipation capability. Its output resistance has an average value of 0....

Boundary Layer Dish Microphone - ideas for a directional microphone assembly (added 4/06)

Brute Force In A Line Stage (100% Tube!) - An OTL mu follower design. "One, often forgotten, purpose of the preamp is to drive headphones. I listen with a pair of AKG K240s, which is a relatively easy load to drive. This all-tube line stage and driver can power them, without resorting to output transformers." Designed by Eric Barbour (circuit design added 08/08/08)

Next B-G Page Previous Page

Audio Amplifiers: #'s - A B-G H-L M-O P-S T-U V-Z