Accession Number : ADD012002

Title :   Tri-State Type Driver Circuit.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Ennis,John J ; Booher,Robert K

Report Date : 10 Sep 1985

Pagination or Media Count : 9

Abstract : An FET complementary pair provides the output to a data line. A data input line is coupled to the gate of the P-FET via an OR gate configuration, and to the gate of the N-FET via an AND gate configuration. The output of each gate configuration is cross-connected to an input of the other. When the input data state changes, the two gate configurations provide delays which are effectively in tandem, so that the FET which was ON is first turned OFF, and after a short delay the other is turned ON. This delay ensures that both FET's are not ON at the same time, which prevents an undesirable power flow. To provide a high impedance 'float' state, an enable input and its complement are connected to the AND and OR gate configurations respectively. (Author)

Descriptors :   *PATENTS, *DRIVES(ELECTRONICS), *N TYPE SEMICONDUCTORS, *DATA TRANSMISSION SYSTEMS, *FIELD EFFECT TRANSISTORS, *P TYPE SEMICONDUCTORS, GATES(CIRCUITS), POWER, LOGIC CIRCUITS, IMPEDANCE, SHORT RANGE(TIME), INPUT, CONFIGURATIONS, FLOW, FLOATS, DATA PROCESSING

Subject Categories : Electrical and Electronic Equipment
      Solid State Physics
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE