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US 4,286,234 AGranted
Multivibrator circuit
AssigneeHoneywell Inc.
InventorRichard W. Denny
Life of this patent
Estimating the term…
Abstract
A multivibrator circuit having a pair of capacitor cross-coupled transistors arranged to form a flip-flop circuit. The base and collector currents for the flipflop transistors are concurrently varied by respective current sources controlled by a multivibrator input signal. The circuit has a constant Beta requirement for the transistors over a wide frequency range while maintaining a high speed operation.
Claims3
A multivibrator circuit comprising
- an input circuit,
- a first switching transistor having a base electrode and a collector electrode,
- a second switching transistor having a base electrode and a collector electrode,
- cross-coupling means interconnecting said first and second transistors for forming a flip-flop circuit, said cross-coupling means including a first capacitor connecting said base electrode of said first transistor to said collector electrode of said second transistor and a second capacitor connecting said base electrode of said second transistor to said collector electrode of said first transistor,
- a first current source means for the base electrodes of said first and second transistors, said first current source means including a third transistor connected between said base electrode of said first transistor and an energizing source and a fourth transistor connected between said base electrode of said second transistor and the energizing source,
- a second current souce means for said collector electrodes of said first and second transistors and,
- energizing means connecting said input circuit to said first and second current source means for providing concurrent energization thereof.
4 more elements
Dependencies are inferred from the claim text.