| US 7,595,685 B1 | ||
| Power efficient and fast settling bias current generation circuit and system | ||
| Satoshi Sakurai, San Diego, Calif. (US) | ||
| Assigned to National Semiconductor Corporation, Santa Clara, Calif. (US) | ||
| Filed on Feb. 27, 2008, as Appl. No. 12/38,186. | ||
| Int. Cl. G05F 1/10 (2006.01) | ||
| U.S. Cl. 327—538 [327/513] | 20 Claims |
| 1. A bias current generation system, comprising:
a proportional to absolute temperature (PTAT) current source generating a PTAT current;
a constant current source generating a constant current; and
a comparator coupled to the PTAT current source and the constant current source comparing the PTAT current and the constant
current and forwarding a greater one of the PTAT current and the constant current as a bias current.
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