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:
Oct. 06, 2026
Filed:
May. 29, 2025
Marvell Asia Pte Ltd, Singapore, SG;
Kai Wu, Singapore, SG;
Kok Hin Teng, Singapore, SG;
Simon Sheung Yan Ng, Singapore, SG;
Akash Salow Thomas, Singapore, SG;
Aravind Suresh, Singapore, SG;
Ziyu Yang, Singapore, SG;
Marvell Asia Pte Ltd, Singapore, SG;
Abstract
High density storage solutions demand a preamplifier for a writer with a fast rise time. The quality and speed of the writer depend on the rise time of a write current waveform. To improve the rise time, an improved base driver is implemented at the base terminal of an output transistor of an H-bridge amplifier circuit. The improved base driver has a push-pull driver, a current mirror circuit, and an alternating current coupled signal path. The improved base driver can create a dip in the voltage at the base terminal during a transition edge of a data signal and increase the base to emitter voltage of the output transistor when the output transistor is turning on. The result is a boost in the output current that is driving the writer, which reduces the rise time significantly.