| 摘要 |
The invention relates to an amplification circuit comprises an input (IN) intended to receive an input voltage (vIN), an output (OUT) intended to present an output voltage (vOUT), a main amplifier (202) designed to receive the input voltage (vIN) from the input (IN), to receive a main control voltage (vCTL,1), to amplify the input voltage (vIN) by a main gain (G1) dependent on the control voltage (vCTL,1), the output voltage (vOUT) corresponding to the input voltage (vIN) thus amplified, and to provide the output voltage (vOUT) to the output (OUT); and a second amplifier (212) designed to receive the input voltage (vIN) from the input (IN), to amplify the input voltage (vIN) by a secondary gain (G2), the main control voltage (vCTL,1) corresponding to the input voltage (vIN) thus amplified, and to provide the main control voltage (vCTL,1) to the main amplifier (A1). During operation, the secondary amplifier (212) has an input admittance (g2) of at least 1 millisiemens. |
