Title:
CURRENT-VOLTAGE CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/186652
Kind Code:
A1
Abstract:
If operated at very low temperatures, FETs used by conventional current-voltage conversion devices have insufficient current-voltage conversion efficiency, making it difficult to achieve current measurement of a good sensitivity. There has also been a problem wherein a desired low temperature environment cannot be achieved due to the inflow of heat from the outside to the inside of a cooling device. Provided is a current-voltage conversion device which measures a minute current with good sensitivity, even in very low temperature conditions. The current-voltage conversion device of the present disclosure uses, as an electronic element for current-voltage conversion, an element (such as an HEMT) that is optimized exclusively for low temperature operation. The current-voltage conversion device can achieve current-voltage conversion properties that are significantly better than in conventional technology, even if operated in very low temperature conditions of close to absolute zero or 150K or less. In addition, the bias circuit and the power source for a current-voltage conversion circuit are simplified, suppressing the inflow of heat from the outside of a cooling device, reducing the load of the cooling device.
Inventors:
HASHISAKA MASAYUKI (JP)
MURAKI KOJI (JP)
AKIHO TAKAFUMI (JP)
MURAKI KOJI (JP)
AKIHO TAKAFUMI (JP)
Application Number:
PCT/JP2020/012150
Publication Date:
September 23, 2021
Filing Date:
March 18, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H01L21/338; H01L29/778; H01L29/812; H03F1/34; H03F3/68
Foreign References:
| JPH04107004A | 1992-04-08 | |||
| JPS60140907A | 1985-07-25 | |||
| JP2009010910A | 2009-01-15 | |||
| JP2015050464A | 2015-03-16 | |||
| JP2010506397A | 2010-02-25 | |||
| JPH036029A | 1991-01-11 |
Attorney, Agent or Firm:
TANI & ABE, P.C. (JP)
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