Back to results
US 9,000,846 B2Granted
Current mirror
AssigneeVIA Technologies, Inc.
InventorYeong-Sheng Lee
Life of this patent
Estimating the term…
Abstract
Some embodiments of the system comprise a current mirror with two switches (a first switch and a second switch) and two compensation circuits (a first compensation circuit and a second compensation circuit). In one embodiment, the first compensation circuit adjusts a drain voltage of the second switch based on a drain voltage of the first switch, and the second compensation circuit adjusts a current through the first switch based on the drain voltage of the second switch.
Claims9
A circuit, comprising:
- a first transistor, comprising:
- a first gate;
- a first source;
- and
- a first drain;
- a second transistor, comprising:
- a second gate electrically coupled to the first gate;
- a second source;
- and
- a second drain;
- a third transistor, comprising:
- a third gate;
- a third source;
- and
- a third drain electrically coupled to the first drain;
- a first amplifier, comprising:
- a first input electrically coupled to the first drain;
- a second input electrically coupled to the second drain;
- and
- a first output electrically coupled to the third gate;
- a second amplifier, comprising:
- a third input electrically coupled to the third source;
- a fourth input electrically coupled to the second drain;
- and
- a second output;
- and
- a fourth transistor, comprising:
- a fourth gate electrically coupled to the second output;
- a fourth source;
- and
- a fourth drain electrically coupled to the third source;
- a fifth transistor, comprising:
- a fifth gate electrically coupled to the first gate;
- a fifth source;
- and
- a fifth drain electrically coupled to the fourth source.
33 more elements
A system, comprising:
- a first switch having a first drain voltage, the first switch comprising a first transistor, the first transistor comprising:
- a first gate;
- a first source;
- and
- a first drain;
- a second switch forming a current mirror with the first switch, the second switch having a second drain voltage, the second switch comprising a second transistor, the second transistor comprising:
- a second gate electrically coupled to the first gate;
- a second source;
- and
- a second drain;
- a third transistor comprising:
- a third gate;
- a third source;
- and
- a third drain electrically coupled to the first drain;
- a first compensation circuit to adjust the first drain voltage according to the second drain voltage;
- and
- a second compensation circuit to adjust a current through the first switch according to the second drain voltage, the second compensation circuit comprising a second amplifier, the second amplifier comprising:
- a third input electrically coupled to the third source;
- a fourth input electrically coupled to the second drain;
- and
- a second output.
19 more elements
Dependencies are inferred from the claim text.