MIL-HDBK-1331 Parameters To Be Controlled For The Specification Of Microcircuits, Handbook ForThis handbook describes the parameters required as a minimum for the specification of microcircuits. Parameters, rather than circuits, are considered because circuits vary with the manufacturers involved. Further, circuit designs should be subject to change if improvement results as long as the affected designs are compatible and fully interchangeable. The specific objectives of this document are as follows: a. To provide the minimum parameters that should be specified to ensure adequate evaluation of circuit design and performance. b. To provide maximum commonality of parameters for purpose of test and measurement, within and between major classes of microcircuit types and to allow the recognition of interface problems between types of microcircuits. c. To provide standard abbreviations, definitions and symbols pertinent to the specification of microcircuits. d. To promote maximum interchangeability and compatibility between microcircuits types.

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MIL-HDBK-1331A

APPENDIX A

A.2.3 Principles of applications.

A.2.3.1 Primary symbols and secondary symbols.

PRIMARY SYMBOLS

Use lower-case letter for:

Use upper-case letters for:

1. Instantaneous or instantaneous total values of current, voltage, or power which vary with

time. Examples: i, v, p (See illustration

A.2.3.2)

1. DC, RMS, RMS total, maximum (peak), or average values of current, voltage, or power. Examples: I, V, P (See illustration A.2.3.2)

2. Values of four-pole matrix parameters (ratios of terminal electrical quantities), or other resistances, impedances, admittances, etc,

inherent in the device, Example: Zid

2. Values of four-pole matrix parameters (ratios of terminal electrical quantities), or other resistances, impedances, admittances, etc, in the external circuits. Examples: RO, ZI

SECONDARY SYMBOLS

Use lower-case letters for:

Use upper-case letters for:

1. Instantaneous, RMS, or maximum (peak)

varying component values.

Examples: vi, Vi, Vim

1. Instantaneous total values, maximum (peak) total values, average, DC, or RMS total values. Examples vI, VIM, VI(AV), VI, VI(RMS)

2. Small-signal values of parameters, Example: AVS

2. Static values and large-signal values of parameters. Example: AVS