Engine control microprocessor start-up circuit

Details Engine control microprocessor start-up circuit Engine control microprocessor start-up circuit

1990-06-22

1991-09-17

Teska, Kevin J.

Boots, shoes, and leggings

36443104, 123479, 331158, 331116FE, 310318, H03B 536

Patent

active

050500856

ABSTRACT:
The crystal-controlled oscillator circuit of the microprocessor comprises, for the starting resistance, a pair of discrete resistors connected in parallel. The two have respective resistance values which in their parallel circuit connection are effective to cause the initiation of electrical oscillation and which are also individually effective to cause the initiation of electrical oscillation so that in the event that one of the individual resistors experiences an open circuit fault, the oscillation can nonetheless be initiated by the other of the individual resistors. The invention provides improved reliability for automotive vehicle engine control systems.

REFERENCES:
patent: 3373379 (1966-06-01), Black
patent: 3838566 (1974-10-01), O'Connor et al.
patent: 3978650 (1976-09-01), Hashimoto et al.
patent: 4704587 (1987-11-01), Ouyang et al.

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