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:
Jan. 24, 2023
Filed:
Jul. 29, 2021
Seiko Epson Corporation, Tokyo, JP;
Masayoshi Todorokihara, Suwa, JP;
Abstract
An A/D conversion circuit includes a comparison-reference-signal generator section configured to generate a comparison reference signal synchronized with a sampling clock signal, a comparator configured to compare a voltage of an input signal and a voltage of the comparison reference signal to thereby generate a trigger signal, a time to digital converter configured to calculate a first time digital value, and a digital-signal generator section configured to generate, based on the first time digital value and a second time digital value, a digital signal corresponding to the voltage of the input signal. The first time to digital converter includes a state transition section configured to start transition of a state based on the trigger signal and output state information, and a weight operation section configured to, in synchronization with the reference clock signal, perform, on a value based on the state information, weighting corresponding to time elapsing and perform a predetermined arithmetic operation to thereby calculate the first time digital value corresponding to the number of transition times of the state.