Archive for May, 2008
4 order filter with a single IC
Filters with high orders are designed usually with 2 or more cascaded sections. This order 4 filter need only one OA IC , so we can achieve lower distorsions, lower intermodulation …
Resistors values represent the load on the OA output, the maximum TL081 load is 2kΩ . R1-R4 build a 2.5kΩ impedance and so the [...]
Power amplifier 50W 2N3055 MJ2955
A very simple power amplifier circuit built with 741, 2N3053, 2N4037, 2N3055 and MJ2955 which deliver up to 50W on a 8Ω speaker.
If you want to amplify lower frequencies increase the 4.7uF capacitor from the audio input or decrease it if you want to favour higher frequencies.
Use a 3A symmetric power supply for mono application [...]
Bridge audio power amplifier TDA2030
A 35W audio power amplifier built with TDA2030 in a bridge connection with a +- 15V symmetric power supply. It is easy to build, do it yourself audio amplifier which will deliver up to 35W on a 8Ω speaker. Please use a good headsink to cool down the TDA2030 power amplifier.
TDA2030 integrates circuits are very [...]
