The signal is amplified and the PI's IC (PIN2) is inverted. The non-inverting pin (PIN3) is connected to the ground. R1 is the input resistor Rf is a feedback resistor. RF and R1 together set the gain of the amplifier. The gain of the R1 and Rf values ​​will have 10 (AV = -Rf/R1 = 10K/1K = 10). RL is the load resistor and the amplified signal will pass through it. Potentiometer R2 can be used to offset the output offset voltage. If you are planning to assemble a circuit, the power supply must be well regulated and filtered. The power supply noise adversely affects the performance of the circuit. When assembling printed circuit boards, it is recommended to install IC bases on integrated circuit boards.
An inverting amplifier with an op amp is a type that uses the amplifier's op amp output waveform to reverse the phase of the input waveform. The input waveform amplifier factor AV (amplifier voltage gain) scale and its phase will fall. The signal amplified in the inverting amplifier circuit is applied to the inverting input of the operational amplifier through the input resistor R1. RF feedback resistor. The combination of Rf and Rin determines the gain of the amplifier. The gain of the inverting op amp can be expressed using the formula AV = - Rf / R1. A negative sign means that the output signal is negative. The circuit diagram of a basic inverting amplifier using an op amp is shown below.
Inverting amplifier using an op amp
Below are the input and output waveforms of the inverting amplifier using the op amp. The plot plot assumes that the amplifier has a gain (AV) of 2 and the input signal is a sine wave. As can be seen from the figure, the output is twice as large as the input (between VOUT = AV x VIN) and the opposite phase.
Operatinal inverting amplifier waveform
A practical inverting amplifier uses the 741.
Below is a simple and practical inverting amplifier using the 741 chip. The uA 741 is a high performance, of course the most popular op amp. It can be used in integration, differential, voltage follower, amplifier, etc. 741 uA wide supply voltage range (+ / - 22V DC), and has a higher open loop gain and other application truth. The IC has an integrated compensation network for improved stability and short circuit protection.
Practical inverting amplifier using 741
The signal is amplified and the PI's IC (PIN2) is inverted. The non-inverting pin (PIN3) is connected to the ground. R1 is the input resistor Rf is a feedback resistor. RF and R1 together set the gain of the amplifier. The gain of the R1 and Rf values ​​will have 10 (AV = -Rf/R1 = 10K/1K = 10). RL is the load resistor and the amplified signal will pass through it. Potentiometer R2 can be used to offset the output offset voltage. If you are planning to assemble a circuit, the power supply must be well regulated and filtered. The power supply noise adversely affects the performance of the circuit. When assembling printed circuit boards, it is recommended to install IC bases on integrated circuit boards.
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