Signal conditioning circuit capable of program-controlled compensation

Abstract

The embodiment of the invention discloses a signal conditioning circuit capable of program-controlled compensation. According to the signal conditioning circuit provided by the embodiment of the invention, the T-shaped network is arranged on an impedance conversion network branch, an adjustable resistor of the T-shaped network is used for adjusting the low-frequency gain at a feedback end of an operational amplifier, so program-controlled adjustment of signals can be realized, and the adjustment effect is optimized. Moreover, the influence of the port capacitance of the digital potentiometer on the circuit bandwidth can be reduced through the T-shaped network, an adjustment error is reduced, and the adjustment effect is further optimized.

Description

technical field [0001] The embodiments of the present application relate to the technical field of signal conditioning, and in particular, to a signal conditioning circuit with programmable compensation. Background technique [0002] At present, in instruments such as an oscilloscope, a signal debugging network is set up to realize circuit impedance transformation and signal attenuation. In this way, a high-impedance input can be converted to a low-impedance output, and the signal can be reduced to a range acceptable to the semiconductor device. In the traditional signal debugging network, the pass-through network and attenuation network are generally selected through relays. When signal attenuation is required, the signal is scaled down by selecting an attenuation network. Among them, the attenuation network uses resistors to form a voltage divider network. Since a high-impedance network is used, an adjustable capacitor needs to be added to the circuit to compensate for t...

AI Technical Summary

Problems solved by technology

However, in the traditional signal debugging network, the adjustable capacitor uses a mechanical adjustable capacitor, which requires manual adjustment, which is prone to adjustment errors and affects the adjustment effect.

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