 Welcome to non-inverting op-amp. An operational amplifier, also known as an op-amp, is a linear integrated circuit device. This versatile component performs several types of operations. The way in which the external components are connected to the input and output pins helps to determine the type of circuit that the op-amp will operate as. The types of components that are used also determine the circuit type. A non-inverting operational amplifier is one type of op-amp circuit. Its name is derived from the way it operates. When a voltage is applied to the lead, called the non-inverting input, a voltage of the same polarity develops at the output. A positive voltage develops at the output when a positive voltage is applied to the input. A negative voltage develops at the output when a negative voltage is applied to the input. The non-inverting op-amp is shown below. The input signal is applied to the non-inverting lead. The amount the op-amp amplifies is determined by the value of resistors, input, and frequency. The equation used to determine the gain of the non-inverting amplifier is derived by adding one to the resistance ratio of frequency and input. By adding one to the resistance ratio, the gain will always be greater than one. For example, suppose positive 1 volt is applied to the non-inverting op-amp. The output voltage is determined by the following calculations. Let's observe the amplification of the non-inverting op-amp when the feedback to input resistance ratio is 10. Let's try a few questions. Question 1. True or false? The way in which the external components are connected to the input and output pins determines the type of circuit that the op-amp will operate as. The answer is true. Question 2. If a positive voltage is applied to the input lead of a non-inverting op-amp, the polarity of the output voltage will be negative or positive. The answer is be positive. And question 3. What is the voltage and its polarity produced at the output? The answer is negative 4.2 volts. You have completed this activity non-inverting op-amp.