Oscillators – Relaxation oscillators
Patent
1993-09-22
1995-04-18
Pascal, Robert J.
Oscillators
Relaxation oscillators
331183, 323222, H03K 300
Patent
active
054082030
ABSTRACT:
A switching boosting circuit including a clock oscillating circuit having a Schmitt trigger inverter, a boosted-voltage inducing circuit which is actuated in a switching-operation mode in response to the output clock of the clock oscillating circuit to induce a boosted voltage, a capacitor which is charged by the boosted voltage from the boosted-voltage inducing circuit to store energy to be supplied to a load, and a feedback path for feeding back current whose intensity corresponds to the load from the capacitor to the clock oscillating circuit. The feedback current acts such that the duty ratio of the switching operation is set to be smaller than a predetermined reference duty ratio, and the feedback path includes a Zener diode for reducing the boosted voltage below a predetermined value.
REFERENCES:
patent: 3869660 (1975-03-01), Davis et al.
patent: 4584517 (1986-04-01), Schwob
Matsuda Norio
Okano Masami
Airbag Systems Company Ltd.
Pascal Robert J.
Vu David
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