The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 2010
Filed:
May. 07, 2008
Joy Y. Zhang, Tucson, AZ (US);
Viola Schaffer, Erlangen, DE;
Joy Y. Zhang, Tucson, AZ (US);
Viola Schaffer, Erlangen, DE;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An operational amplifier (B) amplifies an input signal (Vin) to produce an output signal (Vout), and includes a 3-stage amplifier (C) including a first amplifier stage () receiving the input signal, a second amplifier stage () driven by the first amplifier stage (), and a third amplifier stage () driven by the second amplifier stage to produce the output signal. A slew detection current (Idetect) is generated when the input signal (Vin) exceeds a certain magnitude, and is converted to a control signal () that operates a switch (MN) to short-circuit output conductors of the first amplifier stage to prevent signal charge from building up on capacitances associated with the output of the first amplifier stage during slewing. The three stage amplifier can be a chopper-stabilized, notch-filtered amplifier.