Methods and apparatus for generating clock signals by normalizing duty code to period code
AssigneeSamsung Electronics Co., Ltd.
InventorsJe Kook Kim, Sang Yong Park, Chan Woo Park, Young Hoon Lee, Byeong Ha Park
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Abstract
A clock signal generating method includes receiving a duty code that represents a duty of a clock signal, and a period code that represents a period of a clock signal, and normalizing the duty code to the period code to output a normalized duty code. The clock signal generating method further includes controlling a rising timing of a clock signal in response to the period code, and controlling a falling timing of the clock signal in response to the normalized duty code to generate a timing-controlled clock signal.
Claims30
A clock signal generating method comprising:
- receiving a duty code that represents a duty of the clock signal, and a period code that represents a period of the clock signal;
- and
- normalizing the duty code to the period code and outputting a normalized duty code.
A clock signal generating apparatus comprising a normalized duty code generation circuit that normalizes a signed duty code to an unsigned period code to output a normalized duty code, wherein the signed duty code represents a duty of the clock signal and the unsigned period code represents a period of the clock signal.
A power management integrated circuit (PMIC) comprising:
- a normalized duty code generation circuit that normalizes a duty code to a period code to output a normalized duty code, wherein the duty code represents a duty of a clock signal and the period code represents a period of the clock signal;
- an oscillator that generates a clock signal that has a rising timing controlled based on the period code and a falling timing controlled based on the normalized duty code;
- a driver that drives the clock signal to the outside via a first pin;
- an analog-to-digital converter (ADC) that converts an analogue signal received via a second pin into a digital code;
- and
- a duty code generating circuit that generates the duty code on the basis of a reference code and the digital code.
A mobile communication device comprising:
- an application processor;
- and
- a PMIC that supplies an operating voltage to the application processor via an inductor connected to a first pin,
- wherein the PMIC comprises:
- a normalized duty code generation circuit that normalizes a duty code to a period code to output a normalized duty code, wherein the duty code represents a duty and the period code represents a period;
- an oscillator that generates a clock signal that has a rising timing controlled based on the period code and a falling timing controlled based on the normalized duty code;
- a driver that drives the clock signal to the outside via the first pin;
- an analog-to-digital converter (ADC) that converts an analogue signal received via a second pin into a digital code;
- and
- a duty code generating circuit that generates the duty code on the basis of a reference code output by the application processor and the digital code.
An apparatus comprising:
- a normalized duty code generator circuit that normalizes a signed duty code to an unsigned period code to output a normalized duty code, wherein the signed duty code represents a duty of a periodic signal and wherein the unsigned period code represents a period of the periodic signal;
- and
- a periodic signal generator that generates the periodic signal having the duty and having the period in response to the normalized duty code.
Dependencies are inferred from the claim text.