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US 2013/0076403 A1Published application
Voltage-to-current converter
AssigneeInitio Corporation
InventorsWei Wang, Haiming Tang, Zhenchang Du
Life of this patent
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Abstract
A conversion circuit includes a super source follower circuit configured to lower an impedance of a first node. A digital control circuit is configured to adjust a current at the first node based on a current through the super source follower. An output transistor has a gate configured to receive a first signal. A drain of the output transistor is coupled to a first node, and a source of the output transistor is configured to output an output current based on a voltage of the first signal.
Claims20
A conversion circuit, comprising:
- a super source follower circuit configured to lower an impedance of a first node;
- a digital control circuit configured to adjust a current at the first node based on a current through the super source follower;
- and
- an output transistor having a gate configured to receive a first signal, a drain coupled to a first node, and a source configured to output an output current based on a voltage of the first signal.
1 more element
A method, comprising:
- receiving a current at a first node;
- receiving a first portion of the current through a super source follower circuit coupled to the first node;
- receiving a voltage level at a gate of a transistor coupled to the first node;
- and
- outputting a second portion of the first current from the transistor based on the voltage level.
2 more elements
A conversion circuit, comprising:
- a first plurality of transistors having respective sources coupled to a first voltage supply and respective drains coupled to a first node;
- a first plurality of switches, each of the plurality of switches respectively coupled to a gate of one of the first plurality of transistors;
- a super source follower circuit configured to lower an impedance of the first node;
- a digital control circuit configured to output digital control signals, which are based on a current through the super source follower, to the first plurality of switches for adjusting a current at the first node by selectively coupling the gates of the first plurality of transistors to a bias voltage;
- and
- an output transistor coupled to the first node and configured to output an output current based on a voltage received at a gate of the output transistor.
3 more elements
Dependencies are inferred from the claim text.