Title:
A/D CONVERTER
Document Type and Number:
Japanese Patent JPH0685675
Kind Code:
A
Abstract:
PURPOSE: To apply A/D conversion with high resolution to only a required part.
CONSTITUTION: Resistor strings R1-R192 which show n-bit resolution and resistor strings R193-R447 which show (n+a)-bit resolution are arranged in series in an A/D converter. The resistance value of the resistor string which shows (n+a)- bit resolution is set 1/2 times as much as that of the resistor string which shows the n-bit resolution, and digital output shows (n+a)-bits. Therefore, cost reduction, the reduction of a chip area, and low power consumption can be attained comparing with the case where the whole of A/D converter is made to high resolution.
Inventors:
YOSHIOKA DAISAKU
YONEMARU MASASHI
SHIBATA YOSHIKI
YONEMARU MASASHI
SHIBATA YOSHIKI
Application Number:
JP23078392A
Publication Date:
March 25, 1994
Filing Date:
August 31, 1992
Export Citation:
Assignee:
SHARP KK
International Classes:
H03M1/36; (IPC1-7): H03M1/36
Attorney, Agent or Firm:
Umeda Masaru
Next Patent: A/D CONVERSION CIRCUIT OF R-STRING SYSTEM