Patent ID: 6307491
Filing Date: 2001-10-23
Classification: H03M

Abstract:
A latch system that provides temporary and permanent set and reset trim signals for trimming an electronic circuit, comprising:a latch that generates said set and reset trim signals in respective response to set and reset latch signals;a reset driver that applies said reset latch signal to said latch;a temporary-set driver which removes said reset latch signal from said latch in response to a mode-select signal and which applies said set latch signal to said latch in response to a state-select signal, said latch thereby generates said temporary set trim signal when said mode-select signal and said state-select signal are present and generates said temporary reset trim signal when said mode-select signal is present and said state-select signal is absent; anda permanent-set driver which includes a trimmable link and which, in response to the trimming of said link, removes said reset latch signal from said latch and applies said set latch signal to said latch, said latch thereby generates said permanent set trim signal when said mode-select signal is absent and said trimmable link is trimmed and generates said permanent reset trim signal when said mode-select signal is absent and said trimmable link is not trimmed.