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:
Dec. 01, 2009
Filed:
Dec. 06, 2007
GE Yang, Pleasanton, CA (US);
Hwong-kwo (Hank) Lin, Palo Alto, CA (US);
Charles Chew-yuen Young, Cupertino, CA (US);
Ge Yang, Pleasanton, CA (US);
Hwong-Kwo (Hank) Lin, Palo Alto, CA (US);
Charles Chew-Yuen Young, Cupertino, CA (US);
NVIDIA Corporation, Santa Clara, CA (US);
Abstract
One embodiment of the present invention sets forth a high-speed single-ended memory read circuit that overcomes performance limitations of conventional single ended memory read circuits. A bit line keeper control mechanism for the high-speed single-ended memory read circuit is disclosed that automatically configures the bit line keeper for high-speed operation or low-speed operation, based on the frequency of a system clock. In high-speed operation, the bit line keeper is disabled, thereby eliminating short-circuit currents related to the bit line keeper and increasing the read performance of the single-ended memory read circuit. In low-speed operation, the bit line keeper is periodically disabled by a timer circuit to enable efficient read or write operations. Subsequent to the read or write operation, the bit line keeper is enabled to preserve state on the bit lines. By selectively enabling the bit line keeper, high-speed performance is improved while preserving correct function at low speeds.