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1. 发明申请

US20210058031A1 Oscillator 有权
公开(公告)号：US20210058031A1
公开(公告)日：2021-02-25
申请号：US16815379
申请日：2020-03-11
申请人： Shanghai Huali Microelectronics Corporation
发明人： Ning Zhang , Xuanli Zhu , Zhili Wang
IPC分类号： H03B5/04 , H03B5/24
摘要： An oscillator comprising an RC oscillator and a bandgap reference source, wherein the bandgap reference source provides a reference current for the RC oscillator, and a temperature coefficient of the reference current is adjustable. Since the oscillation frequency of the RC oscillator has less dependency on a power supply, a clock source having a relatively precise frequency thus can be obtained; and based on the RC oscillator, the bandgap reference source having a temperature compensation function is added, the reference current generated by the bandgap reference source with an adjustable temperature coefficient is used for temperature coefficient compensation to the inherent temperature coefficient of the oscillation frequency of the RC oscillator, thereby reducing the effect of the temperature on the oscillator, so that the output frequency of the oscillator does not change with the temperature as far as possible, which improves the oscillation frequency precision of the oscillator.

2. 发明授权

US10992259B2 Oscillator 有权
公开(公告)号：US10992259B2
公开(公告)日：2021-04-27
申请号：US16815379
申请日：2020-03-11
申请人： Shanghai Huali Microelectronics Corporation
发明人： Ning Zhang , Xuanli Zhu , Zhili Wang
IPC分类号： H03B5/04 , H03B5/24
摘要： An oscillator comprising an RC oscillator and a bandgap reference source, wherein the bandgap reference source provides a reference current for the RC oscillator, and a temperature coefficient of the reference current is adjustable. Since the oscillation frequency of the RC oscillator has less dependency on a power supply, a clock source having a relatively precise frequency thus can be obtained; and based on the RC oscillator, the bandgap reference source having a temperature compensation function is added, the reference current generated by the bandgap reference source with an adjustable temperature coefficient is used for temperature coefficient compensation to the inherent temperature coefficient of the oscillation frequency of the RC oscillator, thereby reducing the effect of the temperature on the oscillator, so that the output frequency of the oscillator does not change with the temperature as far as possible, which improves the oscillation frequency precision of the oscillator.

3. 发明授权

US11509318B2 Voltage controlled oscillator structure and phase-locked loop 有权
公开(公告)号：US11509318B2
公开(公告)日：2022-11-22
申请号：US17327294
申请日：2021-05-21
申请人： SHANGHAI HUALI MICROELECTRONICS CORPORATION
发明人： Yuchun Liu , Zhili Wang
IPC分类号： H03L7/099 , H03B5/12
摘要： The present invention includes a voltage controlled oscillator circuit and a phase-locked loop device. The voltage controlled oscillator circuit comprises: a voltage-to-current conversion module, used for converting a control voltage of a voltage controlled oscillator into a control current as a linear function of the control voltage; and a current controlled oscillation module, used for outputting a low-amplitude oscillation signal based on the control current, so as to reduce power consumption. Further provided in the present invention is a phase-locked loop device comprising the voltage controlled oscillator circuit. According to the voltage controlled oscillator circuit, design parameters of low power consumption and high linearity may be achieved, thereby making a gain Kvco of the voltage controlled oscillator relatively stable, and it may be ensured that the voltage controlled oscillator and the phase-locked loop comprising the same have relatively excellent device performance.

4. 发明申请

US20220029628A1 VOLTAGE CONTROLLED OSCILLATOR STRUCTURE AND PHASE-LOCKED LOOP 有权
公开(公告)号：US20220029628A1
公开(公告)日：2022-01-27
申请号：US17327294
申请日：2021-05-21
申请人： SHANGHAI HUALI MICROELECTRONICS CORPORATION
发明人： Yuchun Liu , Zhili Wang
IPC分类号： H03L7/099 , H03B5/12
摘要： The present invention includes a voltage controlled oscillator circuit and a phase-locked loop device. The voltage controlled oscillator circuit comprises: a voltage-to-current conversion module, used for converting a control voltage of a voltage controlled oscillator into a control current as a linear function of the control voltage; and a current controlled oscillation module, used for outputting a low-amplitude oscillation signal based on the control current, so as to reduce power consumption. Further provided in the present invention is a phase-locked loop device comprising the voltage controlled oscillator circuit. According to the voltage controlled oscillator circuit, design parameters of low power consumption and high linearity may be achieved, thereby making a gain Kvco of the voltage controlled oscillator relatively stable, and it may be ensured that the voltage controlled oscillator and the phase-locked loop comprising the same have relatively excellent device performance.

5. 发明授权

US10707882B1 Voltage-controlled oscillator circuit and phase-locked loop circuit 有权
公开(公告)号：US10707882B1
公开(公告)日：2020-07-07
申请号：US16789550
申请日：2020-02-13
申请人： Shanghai Huali Microelectronics Corporation
发明人： Ning Zhang , Zhili Wang
IPC分类号： H03L7/099 , H03L7/089
摘要： The present invention discloses a voltage-controlled oscillator (VCO) circuit, When the VCO circuit works, the DC control voltage is divided into two portions, both of which determine an oscillation frequency of the VCO circuit. One portion of the DC control voltage controls a current provided by the fifth PMOS transistor, and the other portion of the DC control voltage controls the current of the forth PMOS transistor after passing through the third NMOS transistor, thereby controlling oscillation of the VCO circuit. The former plays a leading role when the DC control voltage is relatively low, and the latter plays a leading role when the DC control voltage is relatively high, thereby effectively increasing the use range of the DC control voltage while the high frequency noise interference on the DC control voltage is suppressed. The present invention further discloses a phase-locked loop circuit.

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