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US 10,386,874 B2Granted
Voltage to current converter
AssigneeKabushiki Kaisha Toshiba
InventorsYuji Satoh, Jun Deguchi
Life of this patent
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Abstract
The voltage to current converter according to the present embodiments includes a charge transfer device, a smoother and a current generator. The charge transfer device accumulates charge corresponding to an input voltage, and transfers the accumulated charge. The smoother accumulates the transferred charge to smooth an output voltage. The current generator generates a current corresponding to the input voltage by use of a current corresponding to the charge accumulated in the smoother.
Claims4
A voltage to current converter comprising:
- a charge transfer device that accumulates charge corresponding to an input voltage and transfers the accumulated charge, the charge transfer device comprising a first capacitor;
- a smoother that accumulates the transferred charge and smooths an output voltage;
- and
- a current generator that generates a current corresponding to the input voltage by use of a current corresponding to the charge accumulated in the smoother, wherein
- the current generator comprises:
- a first transistor which is diode-connected and one end of which is directly connected to the smoother;
- and
- a second transistor which is gated in common with the first transistor, the second transistor outputting the current proportional to a value obtained by dividing a product of a transconductance of the second transistor, a capacity of the first capacitor and the input voltage by a value obtained by adding the capacity of the first capacitor to a product of a transconductance of the first transistor and a period at which the charge is consumed in the first transistor.
5 more elements
Dependencies are inferred from the claim text.