Static information storage and retrieval – Read/write circuit – Signals
Reexamination Certificate
2006-09-12
2006-09-12
Nelms, David (Department: 2818)
Static information storage and retrieval
Read/write circuit
Signals
C365S181000, C365S087000
Reexamination Certificate
active
07106638
ABSTRACT:
An active termination circuit is used to set the input impedance of a plurality of input terminals. Each of the input terminals is coupled to a supply voltage through at least one PMOS transistor and to ground through at least one NMOS transistor. The impedances of the transistors are controlled by a control circuit that generates a first control signal to set the impedance of another PMOS transistor to be equal to a first predetermined resistance, and generates a second control signal to set the impedance of another NMOS transistor to be equal to a second predetermined resistance. The first control signal is used to control all of the PMOS transistors and the second control signal is used to control all of the NMOS transistors. As a result, the PMOS and NMOS transistors coupled to each input terminal have impedances corresponding to the first and second resistances, respectively.
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Dorsey & Whitney LLP
Micro)n Technology, Inc.
Nelms David
Nguyen Thinh T
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