electrical engineering

Tuesday, May 1, 2007

50W Power Amplifier Mosfet

This Circuit 50W rms Power Amplifier.
by Power Mofet IRF530 and IRF9530.
...
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50W Power Amplifier Mosfet

TDA820M Mini Amp 2W+2W

This circuit TDA820M Mini Amplifier 2W+2W.
Supply Volt 12V, Easy to build and Low cost.

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PCB - TDA820M Mini Amp 2W+2W

Monday, April 30, 2007

100W OCL Amplifier circuit by A1215 / C2921

Saturday, April 28, 2007

Circuit : Andy Collinson
Email: anc@mitedu.freeserve.co.uk

Description:
A low noise pre-amplifier suitable for amplifying dynamic microphones with 200 to 600 ohm output impedance.

Notes:
This is a 3 stage discrete amplifier with gain control. Alternative transistors such as BC109C, BC548, BC549, BC549C may be used with little change in performance. The first stage built around Q1 operates in common base configuration. This is unusuable in audio stages, but in this case, it allows Q1 to operate at low noise levels and improves overall signal to noise ratio. Q2 and Q3 form a direct coupled amplifier, similar to my earlier mic preamp.

Source: http://www.mitedu.freeserve.co.uk/Circuits/Audio/dyn_mic/dyn_mic.htm

15 Watt Amplifier

Circuit : Sergio Garcํa de Alba Garcin from Guadalajara, Mexico
Email: turboman80@hotmail.com

Description:
A 15 watt amplifier made using discrete components. Sergio designed this circuit for his Electronics Level II course.

Source:http://www.mitedu.freeserve.co.uk/Circuits/Audio/amp15.htm

Hi-Fi Preamplifier (transister)

Design: Graham Maynard
Email graham.maynard1@virgin.net

Notes:
This circuit was submitted by Graham Maynard from Newtownabbey, Northern Ireland. It has an exceptionally fast high frequency response, as demonstrated by applying an 100kHz squarewave to the input. All graphs were produced using Tina Pro.

Source :http://www.mitedu.freeserve.co.uk/Circuits/Audio/gmpre.htm

Pre Tone Control Circuit (Transistor)

Notes:
Based on the classic Baxendall tone control circuit, this provides a maximum cut and boost of around 10dB at 10K and 50Hz. As the controls are passive, the last transistor provides a slight boost. The output is designed to feed an amplifier with input impedance of 10k to 250k. Both tone controls should be linear potentiometers.

Source : http://www.mitedu.freeserve.co.uk/Circuits/Audio/t-ctrl.htm