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:
Jun. 09, 1998
Filed:
May. 31, 1996
Tsuguyasu Hatsuda, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The level shift circuit of this invention includes two reference voltage level generation devices, and a difference between two reference voltage levels generated by these reference voltage level generation devices is used as a level shift voltage to be analog-added to an input analog signal. At least one of the two reference voltage level generation devices has a function to change the reference voltage level thereof in accordance with a supplied offset voltage adjusting signal, thereby changing the level shift voltage to be analog-added to the analog signal in accordance with the offset voltage adjusting signal. Thus, the level shift circuit achieves a function to adjust an offset voltage. When this level shift circuit is applied to a signal waveform generator, there is no need to provide the offset voltage adjusting function to a D/A converter. As a result, the power consumption as well as the circuit area of the signal waveform generator can be decreased.