US 11,989,066 B2
System and method of managing monitoring signals associated with fans of information handling systems
Chi-Chang Fu, Taipei (TW); Feng Cheng Su, Taoyuan (TW); and Chen Chi Hsieh, Taipei (TW)
Assigned to Dell Products L.P., Round Rock, TX (US)
Filed by Dell Products L.P., Round Rock, TX (US)
Filed on Jan. 21, 2022, as Appl. No. 17/648,637.
Prior Publication US 2023/0236645 A1, Jul. 27, 2023
Int. Cl. G06F 1/20 (2006.01); H03F 3/16 (2006.01); H05K 7/20 (2006.01)
CPC G06F 1/20 (2013.01) [H03F 3/16 (2013.01); H05K 7/20172 (2013.01); H05K 7/20209 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An information handling system, comprising:
at least one processor;
a memory medium, coupled to the at least one processor, that stores instructions executable by the at least one processor;
a fan;
a revolution indicator configured to provide signals associated with revolutions of the fan; and
a fan circuit, communicatively coupled to the revolution indicator, comprising:
a plurality of amplifiers; and
a plurality of resistors;
wherein an input of a first amplifier of the plurality of amplifiers is coupled to a first resistor of the plurality of resistors and the revolution indicator;
wherein the first resistor is coupled to a positive voltage reference;
wherein an output of the first amplifier is coupled to an input of a second amplifier of the plurality of amplifiers and a second resistor of the plurality of resistors;
wherein a power supply input of the second amplifier is coupled to a first contact of a first connector and an output of the second amplifier is coupled to a second contact of the first connector;
wherein the first contact of the first connector is configured to be coupled to a first contact of a second connector to drive a resistive load coupled to the first contact of the second connector;
wherein the second contact of the first connector is configured to be coupled to a second contact of the second connector to provide a reference voltage to the second amplifier; and
wherein the second amplifier is configured to provide amplified signals, with reference to a voltage associated with the second contact of the first connector, to the first contact of the first connector based at least on signals received via the input of the second amplifier.