Archive for May, 2008
TL081 datasheet
The TL081, TL081A and TL081B are high speed J–FET input single operational amplifiers incorporating well matched, high voltage J–FETand bipolar transistors in a monolithic integrated circuit.
The devices feature high slew rates, low input bias and off set currents, and low offset voltage temperature coefficient.
tl081-datasheet
Peak indicator circuit schematic TLC272
This peak indicator circuit signals thru 2 led’s the exceeding of a pre-estabilished value of any stereo audio channel.
Signals from the 2 channels are rectified (monoalternance) with D1 and D2 and the resulted voltage is applied on OA IC TLC272 inversor entries.
The peak indicator circuit can be used up to 20kHz frequency and the current [...]
Class A preamplifier
This class A preamplifier has been designed in a symmetrical structure. In the input differential stages we’ve used the dual transistors T1 and T2. Polarisation correction is essential because of the amplification differences and is assured with T12. P2 brings the output voltage to 0.
For maximum performances, T7 and T9 surfaces must be in contact, [...]
