Lock In Amplifier Block Diagram

Input impedance 50 ω 1 mω.
Lock in amplifier block diagram. Specs moku lab spec sheet. Block diagram while a lock in amplifier is an extremely important and powerful measuring tool it is also quite simple. Datasheet lock in amplifier datasheet. Ultra fast data acquisition snapshot mode up to 500 ms s continuous mode up to 1 ms s.
Ac amplifier called the signal amplifier. The sr844 is the widest bandwidth lock in amplifier available. Intuitive user interface block diagram view of the digital signal processing chain. A lock in amplifier is a type of amplifier that can extract a signal with a known carrier wave from an extremely noisy environment.
The sr844 includes the many features ease of operation and programmability that you ve come to expect from srs dsp lock in amplifiers. The lock in consists of five stages. Depending on the dynamic reserve of the instrument signals up to 1 million times smaller than noise components potentially fairly close by in frequency can still be reliably detected. Voltage controlled oscillator vco.
A lock in amplifier also known as a phase sensitive detector is a type of amplifier that can extract a signal with a known carrier from an extremely noisy environment it is basically an analog multiplier followed by a low pass filter practically a lock in amplifier convert the high frequency signal into a dc component or at a very low frequency. The block diagram of a lock in amplifier is shown in figure 1. Filter roll off 6 12 18 or 32 db octave.