US 2025/0147530 A1 · Current-Voltage Conversion Device

Abstract

A current-voltage conversion device that operates with low noise and a wide band is disclosed. In addition to a power supply terminal for supplying a common power supply voltage to five HEMTs (H1 to H5), a dedicated second power supply terminal for the first-stage source common circuit of the first-stage HEMT (H1) is provided. Feedback from H4 to H1 in a current-voltage conversion unit includes a feedback circuit including a plurality of resistive elements connected in series. The feedback circuit is configured by parallel connection of a feedback resistive element having a resistance value RFBk and a feedback capacitor having a capacitance value CFBk (k=1, 2, 3, . . . n). A small feedback capacitance CFB of 1 pF or less is realized using a parasitic capacitance of a resistive element as a necessary capacitance in a feedback circuit. The time resolution of a current-voltage conversion device is enhanced.

Claims14

Dependent claims

A current-voltage conversion device comprising:

an amplification unit that includes at least three stages each of which is formed of electronic elements, a target current being supplied to a first-stage, and amplifies a voltage generated by the target current;
and
a buffer unit that is connected to the amplification unit and outputs the converted voltage, wherein
a common first voltage is supplied to all the electronic elements, and a second voltage different from the first voltage is supplied to an input of the target current of the first-stage electronic element, and
the amplification unit includes a plurality of feedback circuits connected in series that feeds back an output voltage from a final-stage of the amplification unit to the input, and each of the plurality of feedback circuits includes a resistive element.

2 more elements

Dependencies are inferred from the claim text.

Current-Voltage Conversion Device

Life of this patent

Current-Voltage Conversion Device

Life of this patent

Abstract

Claims14