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US 9,184,734 B1Granted
Voltage or current controlled current-feedback operational-amplifier based multivibrator
AssigneeKing Fahd University of Petroleum and Minerals
InventorsMuhammad Taher Abuelma'atti, Zainulabideen Jamal Khalifa
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Abstract
A voltage or current controlled current-feedback operational-amplifier based multivibrator provides oscillation based on two current feedback operational amplifiers, three resistors and one grounded capacitor. The multivibrator can achieve almost constant frequency of oscillation and its duty cycle can be adjusted by a control voltage or a control current. The multivibrator can be used for generating pulse-width modulated signals.
Claims9
A voltage or current controlled current-feedback operational-amplifier based multivibrator, comprising:
- a first current-feedback operational amplifier having
- a first input terminal,
- a second input terminal directly coupled to a voltage control input, and
- a first output terminal,
- a second current-feedback operational amplifier having
- a third input terminal directly coupled to the first output terminal of the first current-feedback operational amplifier,
- a fourth input terminal,
- a second output terminal directly coupled to a output terminal of the multivibrator, and
- a third output terminal,
- a first resistor connected between the first input terminal of the first current-feedback operational amplifier and a ground,
- a second resistor connected between the first output terminal of the first current-feedback operational amplifier and a first node,
- a non-floating capacitor connected between a second node and the ground, wherein the second node is directly connected to the first node,
- a third resistor coupled connected the fourth input terminal of the second current-feedback operational amplifier and ground, and
- a fourth resistor coupled between the fourth input terminal and the third output terminal of the second current-feedback operational amplifier.
11 more elements
Dependencies are inferred from the claim text.