What is the gain of instrumentation amplifier?

The ratio of internal resistors, R2/R1, sets the gain of the internal difference amplifier, which is typically G = 1 V/V for most instrumentation amplifiers (the overall gain is driven by the amplifier in the first stage). The balanced signal paths from the input to the output yield excellent CMRR.

What is chopper stabilized amplifier?

Answer: A chopper-stabilized amplifier is an amplifier that contains two signals paths as shown in the figure below. One of these signal paths is for high frequencies. The other signal path includes analog switches at the input that modulate the input signal such that it is amplified as an AC signal by that amplifier.

On what factors gain of the instrumentation amplifier depends?

The gain of the amplifier depends only on the external resistors used. The output impedance of the instrumentation amplifier is very low due to the difference amplifier3. The CMRR of the op-amp 3 is very high and almost all of the common mode signal will be rejected.

What is gain in instrumentation?

The most commonly used instrumentation amplifier circuit is shown in the figure. The gain of the circuit is. The rightmost amplifier, along with the resistors labelled and is just the standard differential-amplifier circuit, with gain = and differential input resistance = 2· .

What are the effects of a chopper stabilized amplifier?

It is interesting to consider the effects of a chopper amplifier on low frequency 1/f noise. If the chopping frequency is considerably higher than the 1/f corner frequency of the input noise, the chopper-stabilized amplifier continuously nulls out the 1/f noise on a sample-by-sample basis.

How does a Chopper amplifier null out 1 / f noise?

If the chopping frequency is considerably higher than the 1/f corner frequency of the input noise, the chopper-stabilized amplifier continuously nulls out the 1/f noise on a sample-by-sample basis. Theoretically, a chopper op amp therefore has no 1/f noise.

How does a chopper stabilized multipath work?

A chopper stabilization technique within the low-frequency path results in a “ripple”, in which the offset voltage of the IA is modulated to the carrier frequency, and a ripple rejection loop is applied to minimize this effect.

How is a small input signal amplified by the IA?

A small input signal is amplified by the IA, which consists of multipath operational amplifiers and a fully differential amplifier. Also, a successive approximation register (SAR) analog-to-digital converter (ADC) is implemented to convert an analog signal to a digital output.