Tank circuit and frequency hopping for isolators
AssigneeAnalog Devices Global Unlimited Company
InventorsXin YANG, Tianting ZHAO, Baoxing CHEN
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Abstract
Embodiments of the present disclosure may provide a circuit comprising a tank circuit. The tank circuit may include an inductor having a pair of terminals, a first pair of transistors, and a first pair of capacitors. Each transistor may be coupled between a respective terminal of the inductor and a reference voltage along a source-to-drain path of the transistor. Each capacitor may be provided in a signal path between an inductor terminal coupled to a respective first transistor in the first pair and a gate of a second transistor in the first pair.
Claims30
An oscillator circuit, comprising:
- a tank circuit including:
- an inductor having a pair of terminals, the inductor including a central tap coupled to a high reference voltage,
- a first pair of transistors, each transistor coupled between a respective terminal of the inductor and a ground reference voltage along a source-to-drain path of the transistor, and
- a first pair of capacitors, each capacitor provided in a signal path between an inductor terminal coupled to a respective first transistor in the first pair and a gate of a second transistor in the first pair.
(canceled)
A method, comprising:
- at a first time instance activating an inductor-capacitor (LC) tank circuit by:
- activating a first pair of transistors of the tank circuit, each coupled between a respective terminal of an inductor having a pair of terminals and a ground reference voltage along a source-to-drain path of the transistor, the inductor including a central tap coupled to a high reference voltage,
- coupling, as a result of the activating, a first of a pair of capacitors of the tank circuit provided in a signal path between a source or drain terminal of a first transistor in the first pair and a gate of a second transistor in the first pair, and
- coupling, as a result of the activating, a second of the pair of capacitors provided in a signal path between a source or drain terminal of the second transistor in the first pair and a gate of the first transistor in the first pair, wherein a voltage having an oscillation frequency is generated at the terminals of the inductor to transmit power over an isolation barrier.
A circuit, comprising:
- means for activating a first pair of transistors of an inductor-capacitor (LC) tank at a first time instance, each transistor coupled between a respective terminal of an inductor having a pair of terminals and a ground reference voltage along a source-to-drain path of the transistor, the inductor including a central tap coupled to a high reference voltage,
- a first means for coupling, as a result of the activating, a first of a pair of capacitors of the tank circuit provided in a signal path between a source or drain terminal of a first transistor in the first pair and a gate of a second transistor in the first pair, and
- a second means coupling, as a result of the activating, a second of the pair of capacitors provided in a signal path between a source or drain terminal of the other transistor in the first pair and a gate of the first transistor in the first pair, wherein a voltage having the oscillation frequency is generated at the terminals of the inductor to transmit power over an isolation barrier.
The circuit of 25, further comprising:
- means for selectively activating one or more of a plurality of sub-tank circuits connected in parallel with the LC tank circuit at the first time instance.
The circuit of 25, wherein a different oscillation frequency is generated for each time instance of a time period.
Dependencies are inferred from the claim text.