Trimming circuit, power supply including trimming circuit, and trimming method

摘要

A trimming circuit, installed in a semiconductor integrated circuit that has multiple different target values, the trimming circuit to adjusts circuit characteristics of the semiconductor integrated circuit to make output values of the semiconductor integrated circuit correspond to multiple desired target values and includes a setting-value table memory to store multiple setting value groups respectively containing different combinations of multiple setting values related to the multiple target values; a trimming cell circuit to store first selection information indicating one group of the multiple setting-value groups stored in the setting-value table memory; and a selector to select one group from the multiple setting-value group stored in the setting-value table memory based on the first selection information, and select one setting value from multiple setting values in the selected setting-value group based on external second selection information to output the selected setting value.

主权项

1. A trimming circuit, installed in a semiconductor integrated circuit that has multiple different target values, the trimming circuit to adjust circuit characteristics of the semiconductor integrated circuit to make output values of the semiconductor integrated circuit correspond to multiple desired target values,
the trimming circuit comprising: a setting-value table memory to store multiple setting value groups, each of the setting value groups containing multiple setting values associated with the multiple target values, the setting value groups having different combinations of the multiple setting values respectively; a trimming cell circuit to store first selection information indicating one group of the multiple setting-value groups stored in the setting-value table memory; and a selector configured to receive the first selection information from the trimming cell circuit to select one group from the multiple setting-value groups stored in the setting-value table memory based on the first selection information, and receive external second selection information to select one setting value from the multiple setting values in the selected setting-value group based on the second selection information and causes the trimming circuit to output the selected one setting value.