AN CLOCK INTEGRATED CIRCUIT INCLUDING HETEROGENEOUS OSCILLATORS AND APPARATUS INCLUDING THE SAME

• Main Authors: HA GI HYEOK, LEE JAE HOON, KIM JOO MYOUNG, LEE JIN HYEON, KIM SEUNG JIN, OH SEUNG HYUN, YOUN YE LIM, JUNG JAE HONG
• Format: Patent
• Language: English; Korean
• Published: 29.12.2022
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; GENERATION OF NOISE BY SUCH CIRCUITS; GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER; PULSE TECHNIQUE

A clock-integrated circuit according to an exemplary embodiment of the present disclosure comprises: a first clock generator comprising a crystal oscillator and configured to generate a first clock using the crystal oscillator; and a second clock generator comprising an RC oscillator and a first frequency divider with variable frequency division ratios and configured to generate a second clock from a clock output from the RC oscillator through the first frequency divider. The second clock generator is configured to perform a first calibration operation of adjusting a variable frequency division ratio to a first frequency division ratio using the first clock and a second calibration operation of adjusting the first frequency division ratio to a second frequency division ratio using a detected temperature. Accordingly, the degree of integration of a clock-integrated circuit can be improved. 본 개시의 예시적 실시예에 따른 클록 집적회로는, 크리스탈 발진기를 포함하고, 상기 크리스탈 발진기를 이용하여 제1 클록을 생성하도록 구성된 제1 클록 발생기 및 RC 발진기 및 가변 분주비를 갖는 제1 분주기(1st frequency divider with variable frequency division ratios)를 포함하고, 상기 RC 발진기로부터 출력된 클록으로부터 상기 제1 분주기를 통해 제2 클록을 생성하도록 구성된 제2 클록 발생기를 포함하고, 상기 제2 클록 발생기는, 상기 제1 클록을 이용하여 상기 가변 분주비를 제1 분주비로 조절하는 제1 캘리브레이션 동작 및 감지 온도를 이용하여 상기 제1 분주비를 제2 분주비로 조절하는 제2 캘리브레이션 동작을 수행하도록 구성된 것을 특징으로 한다.