US 12,405,624 B2
Linear voltage regulator and test system
Seth N. Kazarians, Duarte, CA (US); Adam S. Trock, Simi Valley, CA (US); Jalal Elidrissi, Santa Clarita, CA (US); and Fatemeh Delijani, Chatsworth, CA (US)
Assigned to MEDTRONIC MINIMED, INC., Northridge (CA)
Filed by Medtronic MiniMed, Inc., Northridge, CA (US)
Filed on Mar. 8, 2024, as Appl. No. 18/600,016.
Application 18/600,016 is a continuation of application No. 16/940,669, filed on Jul. 28, 2020, granted, now 11,960,311.
Prior Publication US 2024/0210980 A1, Jun. 27, 2024
Int. Cl. G05F 1/575 (2006.01); G01R 1/28 (2006.01)
CPC G05F 1/575 (2013.01) [G01R 1/28 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A linear voltage regulator comprising:
an input voltage terminal configured to receive an input current;
an output voltage terminal configured to output an output current substantially equal to the input current;
a series pass field-effect transistor coupled between the input voltage terminal and the output voltage terminal;
a voltage reference source to provide a reference voltage for the linear voltage regulator, the voltage reference source powered by an independent voltage supply that is isolated from the input voltage terminal;
a buffer amplifier comprising a positive buffer input coupled to the output voltage terminal, and a negative buffer input coupled to a buffer output, the buffer amplifier powered by the independent voltage supply; and
an error amplifier comprising an error output coupled to the series pass field-effect transistor, a positive error input operatively coupled to the output voltage terminal, and a negative error input coupled to the voltage reference source to receive the reference voltage, the error amplifier powered by the independent voltage supply, wherein the output of the error amplifier controls impedance of the series pass field-effect transistor to adjust a regulator output voltage at the output voltage terminal.