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:
Sep. 18, 2001
Filed:
Apr. 28, 2000
Applicant:
Inventors:
Akihiro Sasabata, Nagaokakyo, JP;
Shigekazu Okamoto, Nagaokakyo, JP;
Motoyasu Nakao, Nagaokakyo, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03C 1/36 ; H03C 1/38 ; H04L 2/704 ;
U.S. Cl.
CPC ...
H03C 1/36 ; H03C 1/38 ; H04L 2/704 ;
Abstract
An ASK modulator can be operated with only a positive-voltage power source. A source-voltage switching circuit that applies a positive voltage to the source of a FET when a data signal is at an L level in relation to the source of the FET is connected to the source of the FET which has a negative pinch-off voltage. Since the L level of the data signal can be set to 0 V, the ASK modulator can be configured only with the positive-voltage power source. This allows miniaturization and cost reduction to be implemented.