BEHNAM H AHMADIAN
Pilots at Belvue Dr, Los Gatos, CA
License number
California A0013017
Issued Date
Jul 2016
Expiration Date
Jul 2018
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
112 Belvue Dr, Los Gatos, CA 95032
Personal information
See more information about BEHNAM H AHMADIAN at radaris.comName
Address
Phone
112 Belvue Dr, Los Gatos, CA 95032
120 Saratoga Ave, Santa Clara, CA 95051
151 Buckingham Dr, Santa Clara, CA 95051
2208 La Terrace Cir, San Jose, CA 95123
4681 Albany Cir, San Jose, CA 95129
Professional information
See more information about BEHNAM H AHMADIAN at trustoria.com
Apparatus And Method For Scanning A Switch Array
Apparatus And Method For Scanning A Switch Array
US Patent:
5914677, Jun 22, 1999
Filed:
Jan 15, 1997
Appl. No.:
8/779284
Inventors:
Behnam H. Ahmadian - Los Gatos CA
Assignee:
Chips & Technologies, Inc. - San Jose CA
International Classification:
H03M 1120
US Classification:
341 26
Abstract:
A switch array decoding circuit, suitable for use in a keyboard, and method according to the present invention comprises a matrix of row lines and column lines. Switches from the array are connected between intersections of the row lines and column lines. The row lines and column lines are connected to I/O pins leading to one or more components containing the decoder circuitry. The decoder circuitry first simultaneously drives the row lines while sensing the column lines. When a switch closure is detected, the states of all column lines are simultaneously sensed. This operation determines the column position(s) of the one or more switches being closed. The column lines are then simultaneously driven while simultaneously sensing the row lines. This operation determines the row position(s) of the one or more switches being closed. The row and column drive and sense order may be reversed.