Microprocessor emulator active probe power supply

Details Microprocessor emulator active probe power supply Microprocessor emulator active probe power supply

1990-07-24

1991-10-08

Cangialosi, Salvatore

Boots, shoes, and leggings

371 162, G01R 1900

Patent

active

050560336

ABSTRACT:
The active probe power supply uses isolated voltage sensing which powers the active probe from a power supply which uses the system under test power supply in a reference. This power supply interconnection arrangement makes use of Schottky diodes to interconnect the power supply leads of both systems. These diodes turn on quickly to eliminate the potential damage when a shorting fault occurs in either the emulator or the system under test. Furthermore, these diodes behave as capacitors when the power supply voltages are equal to provide high frequency grounding and to maintain a common logic 1 level to provide maximum noise margin. These diodes also introduce a significant impedance in the power supply control loop thereby avoiding loop instability and timing variations due to load driving.

REFERENCES:
patent: 4517512 (1985-05-01), Petrich et al.
patent: 4788683 (1988-01-01), Hester et al.
patent: 4879661 (1989-11-01), Olsen

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