| 摘要 |
An immittance conversion circuit includes a first terminal and a second terminal, and includes: a conversion target circuit configured to amplify or attenuate a signal with desired frequency and gain characteristics, and output the resultant signal; a difference signal detection circuit configured to supply the input terminal of the conversion target circuit with a signal of a difference between signals generated at the first and second terminals; an immittance conversion drive circuit configured to perform differential output processing to generate a voltage of a difference between a correction voltage and the signal outputted from the conversion target circuit, and output feedback signals to an immittance conversion generation circuit; and the immittance conversion generation circuit having an immittance conversion generation action to generate, at each of the first and second terminals, a signal of currents or voltages of the corresponding inputted feedback signal and the signal inputted to the first or second terminal. A signal of a difference between the signals generated at the first and second terminals is inputted to the immittance conversion drive circuit as the correction voltage. |
| 主权项 |
1. An immittance conversion circuit including a first terminal and a second terminal, comprising:
a conversion target circuit configured to amplify or attenuate a signal supplied to an input terminal with desired frequency and gain characteristics, and output the signal to an output terminal; a difference signal detection circuit configured to supply the input terminal of the conversion target circuit with a signal corresponding to a difference between a signal generated at the first terminal and a signal generated at the second terminal; an immittance conversion drive circuit configured to perform differential output processing to generate a positive output signal and a negative output signal for a voltage of a difference between a correction voltage and a signal corresponding to the signal outputted from the conversion target circuit, to output one of the positive output signal and the negative output signal to a first feedback signal input terminal in an immittance conversion generation circuit, and to output the other output signal to a second feedback signal input terminal in the immittance conversion generation circuit; and the immittance conversion generation circuit having an immittance conversion generation action to generate immittance to generate, at the first terminal, a signal of a sum of or a difference between currents or voltages of a feedback signal inputted to the first feedback signal input terminal and the signal inputted to the first terminal, and to generate, at the second terminal, a signal of a sum of or a difference between currents or voltages of a feedback signal inputted to the second feedback signal input terminal and the signal inputted to the second terminal, wherein a signal corresponding to a signal of a difference between the signal generated at the first terminal and the signal generated at the second terminal is inputted to the immittance conversion drive circuit as the correction voltage. |
