US 12,170,100 B1
Systems for and methods for fast mode hop detection and correction for hard disk drive recording systems
Scott O'Brien, Eden Prairie, MN (US); and Gregory W. Starr, Boulder, CO (US)
Assigned to Avago Technologies International Sales Pte. Limited, Singapore (SG)
Filed by Avago Technologies International Sales Pte. Limited, Singapore (SG)
Filed on Oct. 27, 2023, as Appl. No. 18/496,488.
Claims priority of provisional application 63/506,523, filed on Jun. 6, 2023.
Int. Cl. G11B 5/012 (2006.01); G11B 5/00 (2006.01)
CPC G11B 5/012 (2013.01) [G11B 2005/0021 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A circuitry comprising:
a sensor of a first circuit configured to receive as input an optical signal of a laser of a storage device and output a first voltage indicative of the optical signal;
an amplifier of the first circuit configured to amplify the first voltage to produce an amplified first voltage indicative of a mode hop event, the amplified first voltage trailing the optical signal by a first response time of a first frequency response of the first circuit;
a second circuit coupled in series with the first circuit and configured to receive the amplified first voltage, the second circuit operating according to a second frequency response that is an inverse of the first frequency response; and
wherein the circuitry is configured to generate, based at least on the amplified first voltage adjusted by the second frequency response, a second voltage indicative of the mode hop event, the second voltage generated within a second response time that is shorter than the first response time.