US 12,405,623 B2
Amplifier having transconductance attenuation
Saurabh Rai, Bangalore (IN); and Ramakrishna Ankamreddi, Bangalore (IN)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Nov. 29, 2022, as Appl. No. 18/059,720.
Claims priority of application No. 202241053653 (IN), filed on Sep. 20, 2022.
Prior Publication US 2024/0094754 A1, Mar. 21, 2024
Int. Cl. G05F 1/575 (2006.01); H03F 3/45 (2006.01)
CPC G05F 1/575 (2013.01) [H03F 3/45179 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An error amplifier, comprising:
a first transistor having a first error amplifier input and having first and second current terminals;
a second transistor having a second error amplifier input and having third and fourth current terminals;
a first resistor coupled between a supply voltage terminal and the first current terminal;
a second resistor coupled between the supply voltage terminal and the third current terminal;
a circuit coupled to the first and second resistors, the circuit having an error amplifier output, the circuit configured to cause less current to flow through the circuit than a current that flows through either of the first or second resistors or the first or second transistors;
a third transistor having a third control input and fifth and sixth current terminals, the fifth current terminal coupled to the first resistor;
a fourth transistor having a fourth control input and seventh and eighth current terminals, the seventh current terminal coupled to the second resistor;
a third resistor coupled between the first resistor and the fifth current terminal; and
a fourth resistor coupled between the second resistor and the seventh current terminal.