Dynamic amplification circuit

A dynamic amplification circuit, comprising:

• a first drive circuit, configured to receive a first control signal, and generate a first voltage signal and a second voltage signal, the first voltage signal varying with time, and the second voltage signal being a constant voltage;
• a second drive circuit, configured to receive the first voltage signal and the second voltage signal, and generate a first drive signal;
• a third drive circuit, configured to receive the first control signal and the first drive signal, and generate a second control signal;
• and
• a dynamic amplifier (DA), comprising a first control switch, a second control switch and a transistor,
• wherein the DA is configured to receive the first control signal and the second control signal, and control on and off of the first control switch and the second control switch through the first control signal and the second control signal, respectively;
• in a first time period, the first control signal is at a high level, a voltage value of the first voltage signal is a first voltage value, a voltage value of the second voltage signal is a second voltage value, and the second control signal is at a low level;
• in a second time period after the first time period, the first control signal is at a low level, the voltage value of the first voltage signal increases and is less than the second voltage value, the first drive signal is at a low level, and the second control signal is at a high level;
• in a third time period after the second time period, the first control signal is at a low level, the voltage value of the first voltage signal is greater than or equal to the second voltage value, the first drive signal is at a high level, and the second control signal is at a low level;
• and
• duration of the second time period is inversely proportional to a transconductance of the transistor in the DA in a saturation region.