Invention Grant
- Patent Title: Slew boost disable for an operational amplifier
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Application No.: US15848808Application Date: 2017-12-20
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Publication No.: US10333478B1Publication Date: 2019-06-25
- Inventor: Martijn Fridus Snoeij , Sudarshan Udayashankar
- Applicant: TEXAS INSTRUMENTS INCORPORATED
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent John R. Pessetto; Charles A. Brill; Frank D. Cimino
- Main IPC: H03F3/45
- IPC: H03F3/45 ; H03F3/16

Abstract:
An input stage of an operational amplifier receives first and second input voltages. An output slew detection circuit decreases a first current responsive to slewing of an output of the operational amplifier and increases the first current responsive to no slewing. A slew boost and differential input voltage detection generates a second current at a first level when the first and second input voltages are approximately equal and to generate the second current at a second level, smaller than the first level, responsive to the first and second input voltages not being approximately equal. A voltage on a capacitor increases responsive to the first current from the output slew detection circuit increasing and responsive to the second current being at the second level. A current mirror is activated responsive to the voltage on the capacitor exceeding a second threshold. The current mirror decreases a third current of the input stage.
Public/Granted literature
- US20190190472A1 SLEW BOOST DISABLE FOR AN OPERATIONAL AMPLIFIER Public/Granted day:2019-06-20
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