A/D CONVERSION CIRCUIT - MATSUSHITA ELECTRIC IND CO LTD

Title:

A/D CONVERSION CIRCUIT

Document Type and Number:

Japanese Patent JPH01190030

Kind Code:

A

Abstract:

PURPOSE: To increase the resolution by 1 bit by amplifying an input signal twice and reflecting the result at a setting voltage by means of one AD converter.

CONSTITUTION: A comparator 13 discriminates whether an input signal 1 is over or lower than the comparison level 4 and outputs an A/D conversion most significant bit 3 representing logic '1' or '0' accordingly. A noninverting output 5 has an amplitude twice the input signal 1, the inverted output 6 has an inverted amplitude being twice the input signal 1. A switch 14 selects either a noninverting output 5 or an inverted output in response to the most significant bit 3 of A/D conversion being an output of the comparator 13 to form the A/D conversion output 7. Thus, the resolution is increased by one bit more than the resolution of the A/D converter.

More Like This:

JPH03267808	DIGITAL SIGNAL PROCESSING CIRCUIT
JP2001074504	INTERPOLATION CIRCUIT, ENCODER INCLUDING THE SAME AND INTEROLATION METHOD USED THEREFOR

Inventors:

UCHIUMI KUNIAKI

Application Number:

JP1388388A

Publication Date:

July 31, 1989

Filing Date:

January 25, 1988

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MATSUSHITA ELECTRIC IND CO LTD

International Classes:

H03M1/20; (IPC1-7): H03M1/20

Attorney, Agent or Firm:

Toshio Nakao (1 outside)

Previous Patent: AD CONVERTER CIRCUIT

Next Patent: MULTIPLIER CIRCUIT