Samsung Electronics Co., Ltd.

Wonkang Kim

Jaehong Jung

Seungjin Kim

Seunghyun Oh

A crystal oscillator reducing phase noise and a semiconductor chip including the same are provided. The crystal oscillator includes a transconductance circuit electrically connected to a crystal, a load capacitor connected to the transconductance circuit, a feedback resistance circuit connected between an input terminal of the transconductance circuit and an output terminal of the transconductance circuit, the feedback resistance circuit configured to provide a feedback resistance, and a variable resistance controller configured to generate a resistance control signal for controlling the feedback resistance, the resistance control signal causing the feedback resistance to have a first value in a first period and a second value in a second period, the first value being less than the second value, the first period corresponding to a first portion of a cycle of the clock signal, and the second period corresponding to a second portion of the cycle different from the first portion.

Growing community of inventors

Gunpo-si, South Korea

Wonkang Kim