Patent Number: 6,515,540

Title: High order multi-path operational amplifier with output saturation recovery

Abstract: An amplifier is disclosed including multiple integrator stages. The amplifier includes a low-frequency path from a signal input to a signal output and relatively higher-frequency bypass paths around the first integrator stage. The paths converge at a summing node. To prevent instability when the integrators are saturated by large signals, the circuit includes a saturation detector which disables the relatively low-frequency paths during such saturation conditions.

Inventors: Prasad; Ammisetti V. (Austin, TX), Kejariwal; Murari (Austin, TX), Thomsen; Axel (Austin, TX)

Assignee: Cirrus Logic, Inc.

International Classification: H03F 1/08 (20060101); H03F 001/02 ()

Expiration Date: 02/04/2011