Hunton & Williams LLP
Trimmer method and device for circuits
In a trimmer method and device, a reference signal of a target circuit is compared with a test signal, and a binary count output is generated according to result of the comparison. Thereafter, according to logic states of bits of the binary count output, electrical conduction through passive components that are coupled to the target circuit and that correspond respectively to the bits of the binary count output are selectively enabled and disabled so as to adjust the reference signal. The above steps are repeated by varying the binary count output until the reference signal approximates the test signal. Thereafter, fuses coupled to the passive components are melted selectively in a single fuse-melting operation so as to maintain the enabled and disabled states of electrical conduction through the passive components in order to set the reference signal to be approximate to the test signal.
Richtek Technology Corp.
G
G05F
inventional
Cheng-Hsuan Jing-Meng
Fan Liu