Amplifier and oscilloscope

An oscilloscope, comprising a front-end module, a sampling module, an input module, a control processing module, a display module, and a storage module, wherein the front-end module comprises an attenuation unit and an amplifier, wherein an input terminal of the amplifier is connected to the attenuation unit;

• and
• wherein the amplifier comprises:
• a transconductance amplification module comprising an input control terminal pair, wherein the input control terminal pair is connected to an input signal pair, and the transconductance amplification module is configured to convert the input signal pair into an output current pair and output the output current pair;
• a feedforward transconductance module comprising a first feedforward control terminal pair, wherein the first feedforward control terminal pair is connected to the input signal pair and outputs a feedforward current pair, and the feedforward current pair comprises a positive-phase feedforward current and a negative-phase feedforward current;
• and
• a gain control module comprising a first differential pair and a second differential pair, wherein an input terminal of the first differential pair and an input terminal of the second differential pair serve as a feedforward current input terminal pair of the gain control module, the input terminal of the first differential pair is connected to the positive-phase feedforward current, a first output terminal of the first differential pair outputs a first positive-phase compensation current to compensate for a negative-phase output current of the output current pair, a second output terminal of the first differential pair outputs a second positive-phase compensation current to compensate for a positive-phase output current of the output current pair, the input terminal of the second differential pair is connected to the negative-phase feedforward current, a first output terminal of the second differential pair outputs a first negative-phase compensation current to compensate for the negative-phase output current of the output current pair, and a second output terminal of the second differential pair outputs a second negative-phase compensation current to compensate for the positive-phase output current of the output current pair.

An oscilloscope probe, comprising a probe input terminal, a probe input resistor, a probe input capacitor, an amplifier, and a probe output terminal, wherein an input terminal of the amplifier is connected to the probe input resistor and the probe input capacitor separately;

• and
• wherein the amplifier comprises:
• a transconductance amplification module comprising an input control terminal pair, wherein the input control terminal pair is connected to an input signal pair, and the transconductance amplification module is configured to convert the input signal pair into an output current pair and output the output current pair;
• a feedforward transconductance module comprising a first feedforward control terminal pair, wherein the first feedforward control terminal pair is connected to the input signal pair and outputs a feedforward current pair, and the feedforward current pair comprises a positive-phase feedforward current and a negative-phase feedforward current;
• and
• a gain control module comprising a first differential pair and a second differential pair, wherein an input terminal of the first differential pair and an input terminal of the second differential pair serve as a feedforward current input terminal pair of the gain control module, the input terminal of the first differential pair is connected to the positive-phase feedforward current, a first output terminal of the first differential pair outputs a first positive-phase compensation current to compensate for a negative-phase output current of the output current pair, a second output terminal of the first differential pair outputs a second positive-phase compensation current to compensate for a positive-phase output current of the output current pair, the input terminal of the second differential pair is connected to the negative-phase feedforward current, a first output terminal of the second differential pair outputs a first negative-phase compensation current to compensate for the negative-phase output current of the output current pair, and a second output terminal of the second differential pair outputs a second negative-phase compensation current to compensate for the positive-phase output current of the output current pair.