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US 5,963,158 AGranted
Current amplifier and current mode analog/digital converter using the same
AssigneeKabushiki Kaisha Toshiba
InventorAkira Yasuda
Life of this patent
Estimating the term…
Abstract
In a current amplifier, a current obtained by holding an input current from an input terminal by a first current sample/hold circuit is added through a connection to a current obtained by inverting the input current by a current inverter to generate a current twice the input current. This current is alternately sampled and held by second and third current sample/hold circuits and alternately output to an output terminal.
Claims21
A current amplifier comprising:
- a first current sample/hold circuit for sampling and holding an input current at a predetermined period;
- a current inverter for inverting the input current;
- a current adder for adding an output current from said current inverter and an output current from said first current sample/hold circuit;
- second and third current sample/hold circuits for alternately sampling and holding an output current from said current adder;
- and
- an output circuit for alternately outputting, as an output current, the current held by said second and third current sample/hold circuits.
3 more elements
A current amplifier comprising:
- a first current sample/hold circuit for sampling and holding a differential input current at a predetermined period;
- a current adder for adding the differential input current and a differential output current from said first current sample/hold circuit;
- second and third current sample/hold circuits for alternately sampling and holding a differential output current from said current adder;
- and
- an output circuit for alternately outputting, as an output current, the differential current held by said second and third current sample/hold circuits.
2 more elements
An analog/digital converter comprising:
- a first current sample/hold circuit for sampling and holding an input current at a predetermined period;
- a current inverter for inverting the input current;
- a current adder for adding an output current from said current inverter and an output current from said first current sample/hold circuit;
- second and third current sample/hold circuits for alternately sampling and holding an output current from said current adder;
- an output circuit for alternately outputting, as an output current, the current held by said second and third current sample/hold circuits;
- a current comparator for comparing the input current with a reference current and outputting digital data;
- and
- a circuit for selectively outputting one of the output current and a difference current between the output current and the reference current in accordance with a comparison result from said current comparator.
5 more elements
An analog/digital converter comprising:
- a first current sample/hold circuit for sampling and holding a differential input current at a predetermined period;
- a current adder for adding the differential input current and a differential output current from said first current sample/hold circuit;
- second and third current sample/hold circuits for alternately sampling and holding an output current from said current adder;
- an output circuit for alternately outputting, as an output current, the current held by said second and third current sample/hold circuits;
- a current comparator for comparing the differential input current with a reference current and outputting digital data;
- and
- a circuit for selectively outputting one of the differential output current and a difference current between the differential output current and the reference current in accordance with a comparison result from said current comparator.
4 more elements
A current amplifying method comprising the steps of:
- sampling and holding an input current at a predetermined period;
- inverting the input current;
- adding an output current obtained in the current inversion step and an output current obtained in the step of sampling and holding an input current;
- alternately sampling and holding a sum current obtained in the step of adding an output current;
- and
- alternately outputting, as an output current, the current held in the step of alternately sampling and holding a sum current.
3 more elements
Dependencies are inferred from the claim text.