Operation circuit and chip

A chip comprising an operation circuit, wherein the operation circuit comprises a capacitor charging/discharging module and an error amplification module electrically connected to the capacitor charging/discharging module, wherein:

• the capacitor charging/discharging module is configured to:
• receive a first signal and a third signal that are external to the capacitor charging/discharging module, and output a feedback signal;
• the error amplification module is configured to:
• receive the feedback signal and a second signal that is external to the error amplification module, and output a target signal to the capacitor charging/discharging module based on the received feedback and second signals,
• wherein all of the first, second and third signals are analog signals, and
• wherein in a steady state, a value of the target signal, a value of the first signal, a value of the second signal and a value of the third signal satisfy a predefined mathematical relationship comprising a factor, the predefined mathematical relationship including a product of the value of the first signal and the value of the second signal divided by the value of the third signal.