Accession Number : ADD013131

Title :   Stepless Pulse Count Switching.

Descriptive Note : Patent, Filed 10 Jul 85, patented 26 May 87,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Henderson,Alan R ; Sheppard,John P

Report Date : 26 May 1987

Pagination or Media Count : 27

Abstract : An up-down counter is fed pulses generated manually and/or automatically from either or any of two or more command sources. Gating circuitry ahead of the up-down counter may be used to enable counts from only one source at a time. The output of the counter represents the magnitude of the parameter to be controlled. The purpose is to transfer control of a parameter to any of several command sources without changing the value of the parameter, thereby achieving stepless switching. Only one counter is needed regardless of the number of command sources, no synchronizing circuitry is required, and switching is provided with no steps or delays. Multiple command sources may be active simultaneously when command source input gating is not used ahead of the up-down parameter magnitude counter. (Patent)

Descriptors :   *PATENTS, *PULSE COUNTERS, *CONTROL SYSTEMS, *SYNCHRONIZATION(ELECTRONICS), GATES(CIRCUITS), SOURCES, SWITCHING CIRCUITS, TRANSFER, CIRCUITS, PARAMETERS, VALUE

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE