Current control circuit
AssigneeSamsung Electronic Co., Ltd.
InventorsSang-kyu Kim, Dae-young Chung
Life of this patent
Estimating the term…
Abstract
Provided is a current control circuit. A current control circuit may include a clock sensing unit configured to generate a control signal according to one or more frequencies based on a plurality of clock signals, and a current scaling unit configured to scale a bias current according to the control signal. The current control circuit according to example embodiments may dynamically control a bias current according to one or more frequencies based on a plurality of clock signals so that power consumption of an analog-to-digital converter (ADC) and the semiconductor device including the ADC, which require various operating frequencies, may be improved.
Claims20
A current control circuit, comprising:
- a clock sensing unit configured to generate a control signal according to one or more frequencies based on a plurality of clock signals;
- and
- a current scaling unit configured to scale a bias current and output the scaled current in response to a current ratio determined according to the control signal.
A method of controlling a bias current of an analog-to-digital converter (ADC) according to a frequency of a sampling clock signal in the ADC, the method comprising:
- generating a control signal that corresponds to the frequency of the sampling clock signal;
- scaling the bias current according to a predetermined current ratio;
- and
- outputting the scaled current as an operating current of the ADC, in response to the control signal.
A current control circuit, comprising:
- a current scaling unit configured to scale a bias current according to a current ratio and to output the scaled current as an operating current, in response to a control signal corresponding to one or more frequencies based on a plurality of clock signals, with the control signal including a plurality of bits, and each of the bits corresponding to a state of one of a plurality of control transistors of the current scaling unit.
Dependencies are inferred from the claim text.