Title:
【発明の名称】電子カウンタ
Document Type and Number:
Japanese Patent JP2850002
Kind Code:
B2
Abstract:
An electronic counter such as for use in the odometer of a motor vehicle is provided comprising an array (10) of m rows and n columns of single flip-flop data latches and a central shifting unit (14). The central shifting unit (14) comprises a row of n data latches arranged to read data from and write data to each of the m rows of data latches of the array (10). In operation, the central shifting unit (14) reads data from a row of data latches of the array, performs a shift operation on the data and an invert operation on one of n data latches of the central shifting unit (14) and returns the data so operated on to the row of data latches in the array (10). By these steps, a counting operation in Johnson code is performed on the data. This invention uses less chip area than known counters.
Inventors:
WAANAA DEBITSUDO JON
Application Number:
JP50405187A
Publication Date:
January 27, 1999
Filing Date:
July 10, 1987
Export Citation:
Assignee:
HYUUZU MAIKUROEREKUTORONIKUSU LTD
International Classes:
G01C22/00; H03K21/00; H03K21/40; H03K23/54; (IPC1-7): H03K21/00; G01C22/00
Domestic Patent References:
| JP59158627A | ||||
| JP4878869A | ||||
| JP5542539B2 |
Attorney, Agent or Firm:
Ishihara Masanori