Power Amplifier 6

Posted on Feb 5, 2014

This simple circuit was a presented, it can give power output about 1 watt, when connected to a power supply 9 volt. The advantage of this circuit is that it uses a dual darling ton to increase the size as much as of input impedance about 20 Meg ohm. This circuit unlike other circuits, the input impedance is a constant about 20 Meg ohm always, wheth

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er to adjust the volume control on any level. The components in the circuit, it is cheap, especially the BC549 transistor output number when the increase will be very distorted, it must reduce the current level to a safe By reducing the volume down. The sector output for the R1 and C1 in order to reduce the oscillator gain is, the fact that the output sector, including an op-amp acts drive dual complementary. The electrical signals from transducer, Sometimes, it is value less too, For input to the circuit to convert signals from analog to digital. To achieve a satisfactory, We need a power amplifier, who can tell strength of the input signal is simple. This can extend the input signal from the transducer is 10 times and 100 times. Circuit consists of op-amp IC1 No. 741, To give the appearance of non inverting circuit, R1 is configured input impedance switches. In this the 75 kilo ohms, negative feedback circuit consists of R3 or R4 together with R2, which defines the gain of the circuit. Power supply for this circuit requires two sets of power supply positive and negative, which was in the range of positive, negative 6 volts to the positive, negative 15 volts, in this value add, subtract 9, because available with 9-volt battery immediately. This circuit is able to identify PAL and NTSC video signals. Its output is high for an NTSC signal and low if the signal is PAL. This output signal can be used, for example, to...

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