MOSFET Multivibrator with dual timing

Details MOSFET Multivibrator with dual timing MOSFET Multivibrator with dual timing

1981-05-12

1983-10-18

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331108D, H03K 3353

Patent

active

044108621

ABSTRACT:
Accurate and reliable multivibrators are achieved having most of the advantages of on-chip circuits and producing signals with long cycle periods. An off-chip capacitor (1) in an RC timing circuit is charged during the period defined by on-chip capacitor (31) and resistance (33 and 11) RC timing circuit. The cross-coupled circuit has switches (17) and (19) on at least one side, each effective to connect operating potential to respective ones of the two RC circuits. Each has at least two switches (190) and (270) connected in parallel on the other side of the circuit, each operated by respective ones of the two RC circuits of the first side to hold the other side to ground until both RC circuits have operated for preselected periods. Bootstrap voltage from a capacitor (51) is employed to gate the switch FET (45) to the off-chip capacitor (1) strongly on.

REFERENCES:
patent: 3748591 (1973-07-01), Visioli, Jr. et al.
patent: 3863179 (1975-01-01), Goo
patent: 3878482 (1975-04-01), Schowe
patent: 4083019 (1975-04-01), Hamada et al.
patent: 4336508 (1982-06-01), Cole et al.

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