A voltage amplifier increases the voltage output higher than the input voltage, while a power amplifier creates a more powerful output. A voltage booster is used to transmit higher voltage across longer wires. Voltage amplifiers increase power passing through a circuit to achieve a desired result and are not suited for powering devices such as motors. Creating a voltage booster circuit requires two resistors and an op amp. Different types of voltage amplifiers include inverting and non-inverting amplifiers and voltage difference amplifiers. It is important to understand the desired outcome before choosing the appropriate voltage amplifier.
In the simplest electronic terms, a voltage amplifier is any amplifier that creates a voltage output higher than the input voltage originally fed through the amplifier. This is different from a power amplifier, which creates a more powerful output than the original signal power sent to the amplifier. A voltage booster is used when the transmission of a higher voltage across a longer wire or larger area is required and is similar to a transformer in that it can increase the voltage at the output. A voltage booster can be thought of as a hose nozzle: the amount of water flowing into the hose is amplified into the force that comes out of the nozzle.
A voltage amplifier does not provide power, it simply increases the amount of power passing through a given circuit to achieve a desired result. These amplifiers are typically not suited for powering devices such as motors, but rather are intended to increase the amount of voltage available to assist in reading signals from various controls or other items. For example, a low voltage sensor that might read the oxygen level in a vehicle’s exhaust or the amount of torque coming from an electronic motor might need a voltage amplifier to receive enough voltage to correctly measure the signal it should receive .
Creating a voltage booster circuit is fairly straightforward and generally only requires two resistors and an op amp. Combining these will create a simple amplifier that can potentially perform a number of tasks. There are several types of voltage amplifiers, including inverting and non-inverting amplifiers, which can either invert the natural sine wave of the input current or not, depending on the desired output. There are also voltage amplifiers, known as voltage difference amplifiers, and they can amplify the voltage difference in a circuit so that this different voltage output can be read and analyzed.
It is important to fully understand what an individual is attempting to achieve with a voltage amplifier. This must be done before deciding which type is right. Once an individual has designed his electrical circuit for the right amount of voltage output and input, he will be able to determine what voltage amplification, if any, is required to make his electronic devices work properly.
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