Boots – shoes – and leggings
Patent
1982-04-21
1984-12-18
Zache, Raulfe B.
Boots, shoes, and leggings
G06F 100
Patent
active
044893949
ABSTRACT:
Initialization problems in a microprocessor controlled system due to power interrupts or rapid cycling of the ON/OFF control are eliminated by insuring that a logic initialization signal is provided only after microprocessor power up and is removed before the microprocessor is subject to a power outage. By insuring the proper sequencing of the microprocessor initialization input signal and the supply voltage applied thereto, microprocessor operation is initiated under the proper logic and timing conditions. The present invention is particularly adapted for use in a microprocessor controlled tuning system for a television receiver where the power supply is operated not from horizontal scan circuitry but from a conventional 60 Hz power supply. The large time constants used with this low frequency power supply for optimum signal processing generally result in a more rapid decay of the power supply input than the power on reset, or initialization, signal. This may cause microprocessor initialization problems if power is reapplied to the television receiver after a short period. At the start of a power outage, the initialization signal is coupled to and grounded by a shunt regulator to the microprocessor which regulates the 60 Hz power applied thereto.
REFERENCES:
patent: 3535560 (1970-10-01), Cliff
patent: 4080659 (1978-03-01), Francini
patent: 4279020 (1981-07-01), Christian
Eng David Y.
Zache Raulfe B.
Zenith Electronics Corporation
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