Agilent Technologies 2948 Schematic Diagram Notes 5, Combinational Logic Symbols and Functions

Service Model 8904A

Table 8-1. Schematic Diagram Notes (5 of 11)

DIGITAL SYMBOLOGY REFERENCE INFORMATION

Combinational Logic Symbols and Functions

cSumming Junction-Outputs added together at a common point.

8AND-All inputs must be active for the output to be active.

21OR-One or more inputs being active will cause the output to be active.

zm	Logic Threshold-m	or more inputs being active will cause the output to be active
	(replace m with a number).
=1	EXCLUSIVE OR-Output will be active when one (and only one) input is active.
=m	m and only m-Output	will be active when m (and only m) inputs are active (replace
	m with a number).
	Logic Identity-Output will be active only when all or none of the inputs are active
	(Le., when all inputs are identical, output will be active).
	Amplifier-The output will be active only when the input is active (can be used with
	polarity or logic indicator at input or output to signify inversion).
	Signal Level Converter-Input level(s) are different than output level(s).
	Bilateral Switch-Binary controlled switch which acts as an on/off switch to analog
	or binary signals flowing in both directions. Dependency notation should be used
	to indicate affecting/affected inputs and outputs. Note: amplifier symbol (with depen-
	dency notation) should be read to indicate unilateral switching.
x-Y	Coder-Input code (X) is converted to output code (Y) per weighted values or a table.
(Functional Labels)	The following labels are to be used as necessary to ensure rapid identification of
	device function.
MUX	Multiplexer-The output is dependent only on the selected input.
DEMUX	Demultiplexer-Only	the selected output is a function of the input.
CPU	Central Processing Unit

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