公开(公告)号：US20220390992A1

公开(公告)日：2022-12-08

申请号：US17342237

申请日：2021-06-08

Applicant: Quanta Computer Inc.

Inventor： Chia-Ming LIANG ,  Jen-Mao CHEN ,  Hsiao-Ching CHEN ,  Yu-Tang ZENG

IPC: G06F1/20 ,  H05K7/14 ,  H03K5/24 ,  H05K7/20

Abstract: A field-replaceable unit (FRU) identification circuit includes a reference voltage source, a reference resistor, a plurality of comparators, and a plurality of comparator input voltage sources. The reference voltage source provides a reference voltage. A first end of the reference resistor is electrically connected to the reference voltage source. Each comparator has two inputs and an output. A first input of each comparator is electrically connected to a second end of the reference resistor. The comparator input voltage sources each provide a comparator input voltage to the second input of one of the comparators. When an FRU is electrically connected to a circuit board where the FRU identification circuit is located, the outputs of the comparators are set to a distinct combination of logical values that uniquely identifies the FRU.