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Power Amp Bridge Adapter - A conventional adapter for bridging
power amplifiers (schematic added 6/07)
Power Amp using a TDA2003 - This is the weakest amp on my site.
There are weaker ICs available, but I won't add them until sonmeone
actually asks for them. Note that the circuit is quite simple, the IC
even seems to be DC biased internally on both inputs. (Circuit design
added 7/06)
Power Amp using a TDA2005 - This is a stereo IC, so that you can make a
stereo amp with a single IC. The amp is internally DC-biased and the amplification
is also set internally. Don't even try to set a different amplification, it's no
use. There are also schematics of bridged amps with this IC, but I think it's a
fraud the distortion grows one decimal order higher.... (Circuit design added
7/06)
Power Amp using a TDA2007 - This is a stereo IC, so that you can make a
stereo amp with a single IC. The amp is internally DC-biased and the amplification
is also set internally. Don't even try to set a different amplification, it's no
use. There are also schematics of bridged amps with this IC, but I think it's a
fraud the distortion grows one decimal order higher (general property of bridged
configurations) (Circuit design added 7/06)
Power Amp using a TDA2009 - This is a stereo IC, so that you can make a
stereo amp with a single IC. The amp is internally DC-biased and the amplification
is also set internally. Don't even try to set a different amplification, it's no
use. There are also schematics of bridged amps with this IC, but I think it's a
fraud the distortion grows one decimal order higher (general property of bridged
configurations). (Circuit design added 7/06)
Power Amp using a TDA2030 - For me, this IC is an essential classic. It
behaves almost exactly like a regular op-amp, you can have lots of fun
experimenting with it. The two clamping diodes on the output protect the output
transistors against glitches caused by complex load (speaker sets). The
Boucherot's cell on the output is typical for power amps. Generally speaking,
this IC is slow, which means both higher THD and no problems with oscillations....
(Circuit design added 7/06)
Power Down for Portables - 06/21/01 EDN-Design Ideas: James Prescott Joule
first formulated the relationship between electrical current and dissipated power
in the 19th century. Joule's Law states that the power a circuit dissipates is
equal to the square of the current times resistance, (P=I 2 R]. The SI
(International System]unit of work bears Joule's name in honor of this
discovery....[Design Idea added 12/04] EDN migrating links. This link is not
verified. Google the "title" EDN for new link.
PreAmplifier Computer Microphone - This circuit was submitted by Lazar Pancic
from Yugoslavia. The sound card for a PC generally has a microphone input, speaker
output and sometimes line inputs and outputs. The mic input is designed for
dynamic microphones only in impedance range of 200 to 600 ohms. Lazar has adapted
the sound card to use a common electret microphone using this
circuit....(electronic design added 6/07)
Quadraphonic Amplifier - This is a four channel amplifier ideally suited for
use with quadraphonic equipment such as a Sound Blaster Live card. (added 4/02)
Reference Design for the Tas5110dad Digital Audio PWM Power Output Stage -
The true digital audio amplifiers (TDAA) system consists of a PCM–PWM modulator
device and a PWM power output device. The PCM–PWM processor accepts a serial PCM
digital audio stream and converts it to a 3.3-V PWM audio stream. The TDAA output
stage provides a large-signal PWM output. The digital PWM....(added 3/05)
