High density, dynamic, content-addressable memory cell
United States Patent [191
[11]
Patent Number:
4,780,845
Threewitt
[45]
Date of Patent:
Oct. 25, 1988
[54]
4,680,760 7/1987 Giles et a1. .......................... .. 371/21
HIGH DENSITY, DYNAMIC,
CONTENT-ADDRESSABLE MEMORY CELL [75]
Inventor‘
N- 3”“ Th'eew‘tt’ FremOm, Cahf-
[73]
Assignee:
Advanced Micro Devices, Inc.,
[21] A l N PP -
[22] Filed:
9/1982 Fed. Rep. of Germany ...... .. 365/49 ‘
Sunnyvale’ calm
Primary Examiner-Joseph A. Popek
889 545
Attorney, Agent, or F1rm--Eugene H. Valet; Patrick T.
9-1
’
‘
King
Jul. 23, 1986
[57]
Int. Cl.4 ............................................ .. G11C 15/00
[52]
US. Cl. .............................. .. 365/49; 365/182
Field of Search
’
’
.
3-}1/21’
4,538,243
8/1985
6/1987 Alrny ................................... .. 365/49
.
are dlsclosed. Each cell compnses a random access memory storage component and a comparison compo
_ References clted U5. PATENT DOCUMENTS 4,670,858
ABSTRACT
A contem_addressable memory cell and memory array
365/49 230 189 182
"""""""" "
[561
3105503 ’
[51]
[58]
FOREIGN PATENT DOCUMENTS
nent for performing the content addressability function. In a disclosed cMos embodiment, a DRAM cell and an exclusive-NOR gate are combined to form the CAM cell.
Zehner ................................ .. 365/49
12 Claims, 1 Drawing Sheet
BL.
msm.
':/4‘ MATCH L ;
\°\:
' -
‘
‘6
_
2
i 21
a:
24
\4
6 6
M. 9)
by
\e,
'
US. Patent
4,780,845
Oct. 25, 1988 BL
MATCH L a
P4
a8 2'1.
7.0
FIG. 1
mI'l‘
[11]
Patent Number:
4,780,845
Threewitt
[45]
Date of Patent:
Oct. 25, 1988
[54]
4,680,760 7/1987 Giles et a1. .......................... .. 371/21
HIGH DENSITY, DYNAMIC,
CONTENT-ADDRESSABLE MEMORY CELL [75]
Inventor‘
N- 3”“ Th'eew‘tt’ FremOm, Cahf-
[73]
Assignee:
Advanced Micro Devices, Inc.,
[21] A l N PP -
[22] Filed:
9/1982 Fed. Rep. of Germany ...... .. 365/49 ‘
Sunnyvale’ calm
Primary Examiner-Joseph A. Popek
889 545
Attorney, Agent, or F1rm--Eugene H. Valet; Patrick T.
9-1
’
‘
King
Jul. 23, 1986
[57]
Int. Cl.4 ............................................ .. G11C 15/00
[52]
US. Cl. .............................. .. 365/49; 365/182
Field of Search
’
’
.
3-}1/21’
4,538,243
8/1985
6/1987 Alrny ................................... .. 365/49
.
are dlsclosed. Each cell compnses a random access memory storage component and a comparison compo
_ References clted U5. PATENT DOCUMENTS 4,670,858
ABSTRACT
A contem_addressable memory cell and memory array
365/49 230 189 182
"""""""" "
[561
3105503 ’
[51]
[58]
FOREIGN PATENT DOCUMENTS
nent for performing the content addressability function. In a disclosed cMos embodiment, a DRAM cell and an exclusive-NOR gate are combined to form the CAM cell.
Zehner ................................ .. 365/49
12 Claims, 1 Drawing Sheet
BL.
msm.
':/4‘ MATCH L ;
\°\:
' -
‘
‘6
_
2
i 21
a:
24
\4
6 6
M. 9)
by
\e,
'
US. Patent
4,780,845
Oct. 25, 1988 BL
MATCH L a
P4
a8 2'1.
7.0
FIG. 1
mI'l‘
