Pre AMP Amplifier Overview
The pre AMP amplifier is circuit or electronic device placed between signal source and amplifier. It is designed to receive the weak voltage signal from the signal source. The preamplifier amplifies the useful signal as well as the noise. The low-noise preamplifier is preamplifier that minimizes the noise factor of the circuit. For weak signal detection instruments or devices, pre AMP amplifier is one of the main components to introduce noise. The noise factor of whole detection system mainly depends on the noise factor of pre-AMP amplifier . The minimum signal that instrument can detect also depends on the noise of preamplifier. Pre-AMP amplifier is usually connected directly to the sensor used to detect signal. Only when the best source resistance is equal to the signal source output resistance, noise factor of the circuit will be minimized. The function of the Pre AMP Amplifier 1. Improve SNR of the system (improves the SNR because preamplifier c...