Differential circuit with current control device
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorSoo Woong Lee
Life of this patent
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Abstract
A current control device for a differential circuit is provided. The current control device includes a differential circuit that generates differential signals comprising a positive signal and a negative signal in opposite phases, an amplitude detection circuit detecting an amplitude of the differential signal and outputting first and second detection voltages, an error amplification circuit controlling the differential circuit on the basis of an error voltage between the first and second detection voltages, and a current control circuit controlling the amplitude detection circuit on the basis of any one of the first and second detection voltages.
Claims14
A current control device comprising:
- a differential circuit configured to generate differential signals comprising a positive signal and a negative signal in opposite phases;
- an amplitude detection circuit configured to detect an amplitude of the differential signals and output a first detection voltage and a second detection voltage;
- an error amplification circuit configured to control the differential circuit based on an error voltage between the first detection voltage and the second detection voltage;
- and
- a current control circuit configured to control the amplitude detection circuit based on any one of the first detection voltage and the second detection voltage,
- wherein, subsequent to the current control circuit performing a control operation with a maximum current, an internal current of the amplitude detection circuit is reduced by the current control circuit if the amplitude of the differential signals is greater than a magnitude of a power voltage supply.
A current control device comprising:
- a differential circuit which comprises a current regulator and a differential oscillation circuit configured to perform an oscillation operation based on a current regulated by the current regulator, and generate a differential signal that has a positive signal and a negative signal in opposite phases;
- an amplitude detection circuit configured to detect an amplitude of the differential signal and output a first detection voltage and a second detection voltage;
- an error amplification circuit configured to control the current regulator based on an error voltage between the first detection voltage and the second detection voltage;
- and
- a current control circuit configured to control the amplitude detection circuit based on any one of the first detection voltage and the second detection voltage,
- wherein, subsequent to the current control circuit performing a control operation with a maximum current, an internal current of the amplitude detection circuit is reduced by the current control circuit if the amplitude of the differential signal is greater than a magnitude of a power voltage supply, and an internal current of the amplitude detection circuit is maintained by the current control circuit if the amplitude of the differential signal is less than the magnitude of the power voltage supply.
Dependencies are inferred from the claim text.