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:
Apr. 26, 2005
Filed:
Sep. 15, 2003
Alex I Krymski, La Crescenta, CA (US);
Alex I Krymski, La Crescenta, CA (US);
Micron Technology, Inc., Boise, ID (US);
Abstract
A ramp generator includes an array of capacitors having a common top plate that provides a ramp output signal. Each of the capacitors has a bottom plate switched sequentially between a low reference voltage and a high reference voltage in response to a value in a shift register. For an upward ramp, capacitors can be switched to their high reference voltages in succession, increasing the output voltage on the common top plate; for a downward ramp, capacitors can be switched to their low reference voltages in succession, decreasing the output voltage. The capacitors can be switched by a multi-bit shift register, each bit of which controls one capacitor's voltage. Each time a clock signal is applied to the shift register, a value in the shift register shifts another capacitor between its low and high reference voltages.