| US 7,576,617 B2 | ||
| Semiconductor integrated circuit device | ||
| Takatoshi Itagaki, Chitose (Japan); and Makio Abe, Chitose (Japan) | ||
| Assigned to Mitsumi Electric Co., Ltd., Tokyo (Japan) | ||
| Filed on Feb. 13, 2007, as Appl. No. 11/705,705. | ||
| Claims priority of application No. 2006-035592 (JP), filed on Feb. 13, 2006; and application No. 2007-011479 (JP), filed on Jan. 22, 2007. | ||
| Prior Publication US 2007/0205830 A1, Sep. 06, 2007 | ||
| Int. Cl. H03B 5/12 (2006.01) | ||
| U.S. Cl. 331—49 [331/2; 327/298] | 7 Claims |
| 1. A semiconductor integrated circuit device connectable to a battery, comprising:
a signal processing unit including a nonvolatile memory storing circuit setting information and a current detection circuit
having circuit parameters;
a plurality of oscillation sources outputting a plurality of oscillation signals; and
a selection control unit configured to select one of the oscillation signals output from the oscillation sources according
to a selection signal, and to control a transfer timing for transferring the circuit setting information from the nonvolatile
memory to the current detection circuit and an operations start timing for starting signal processing operations of the signal
processing unit according to the selected oscillation signal,
wherein the current detection circuit is configured to detect a charge current to or a discharge current from the battery
and to adjust the circuit parameters based on the circuit setting information.
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