公开(公告)号：US10069489B2

公开(公告)日：2018-09-04

申请号：US15598003

申请日：2017-05-17

申请人： Cemin Zhang

发明人： Cemin Zhang

IPC分类号： H03B19/06 ,  H03K5/00 ,  H03K21/02

摘要： The disclosure discloses a multiplexer based frequency extender comprising a preamplifier to receive a RF input signal and output a pre-amplified RF signal, at least one frequency multiplier or at least one frequency divider, and a multiplexer. The multiplexer comprises multiple differential pairs, each differential pair comprises a corresponding bias current control circuit that switches ON or OFF a bias current flowing through a corresponding differential pair. The at least one frequency multiplier or the at least one frequency divider receives the pre-amplified RF signal and outputs a frequency-multiplied RF signal or a frequency-divided signal. The multiplexer couples to receive the pre-amplified RF signal, the frequency-multiplied RF signal and/or the frequency-divided signal, the multiplexer selects a signal from the received signals and outputs based on the selected signal a multiplexer output signal.

公开(公告)号：US20180375486A1

公开(公告)日：2018-12-27

申请号：US15679690

申请日：2017-08-17

申请人： Cemin Zhang

发明人： Cemin Zhang

IPC分类号： H03H7/20 ,  H03H7/19 ,  H01P1/18

摘要： This invention relates to analog phase shifters, and more particularly, to analog phase shifters for controlling the phase of an RF signal over a wide range of frequencies with nearly linear phase change. An exemplary phase shifter includes a front end high-low pass filter, a back-end high-low pass filter, and an all-pass filter coupled in series between the two high-low pass filters. At least one of the filters is tunable for controlling the phase of an input signal over a wide range of frequencies. The high-low pass filter comprises low-pass filters as input and output interface for the high-low pass filter to facilitate impedance match for receiving and outputting RF signal.

公开(公告)号：US20180145630A1

公开(公告)日：2018-05-24

申请号：US15447764

申请日：2017-03-02

申请人： Cemin Zhang

发明人： Cemin Zhang

IPC分类号： H03B7/06

CPC分类号： H03B5/1231 ,  H01L23/66 ,  H01L24/15 ,  H03B5/1203 ,  H03B5/1243 ,  H03B5/1262 ,  H03B7/06

摘要： The invention discloses a voltage controlled oscillator (VCO) based on hybrid resonator, including a hybrid resonator and a negative resistance circuit, wherein the hybrid resonator includes the first LC series resonance branch, the second LC series resonance branch and the third LC series resonance branch. The first LC series resonance branch and the second LC series resonance branch forms a parallel structure, in which one end of the said parallel structure is grounded while the other end is connected to the third LC series resonance branch, and the other end of the third LC series resonance branch is connected to the negative resistance circuit. The resonance frequency of the first LC series resonance branch is lower than that of the second LC series resonance branch. The invented VCO can effectively improve the phase noise, especially maintain a good phase noise with the increase of the tuning frequency.

公开(公告)号：US08981873B2

公开(公告)日：2015-03-17

申请号：US12932193

申请日：2011-02-18

申请人： Cemin Zhang ,  Michael Koechlin

发明人： Cemin Zhang ,  Michael Koechlin

IPC分类号： H03H7/01 ,  H03H7/20 ,  H03H7/12

CPC分类号： H03H7/0153 ,  H03H7/12 ,  H03H7/20 ,  H03H2007/013

摘要： This invention features an absorptive tunable bandstop filter with a wide tuning range including first and second branches of all-pass filter networks, an input power divider for splitting the input signal and passing approximately half of the input signal power through each branch of the all-pass filter networks, and an output power combiner for recombining the signal power from each branch of the all-pass filter networks, at least one of the branches of the all-pass filter networks being electrically tunable to provide an approximately 180° phase difference with similar amplitudes of the split signal power to be recombined at the output power combiner for rejecting but substantially absorbing selected frequencies.

摘要翻译： 本发明的特征在于具有宽调谐范围的吸收可调谐带阻滤波器，包括全通滤波器网络的第一和第二分支，输入功率分配器，用于分离输入信号，并将输入信号功率的大约一半通过全通滤波器的每个分支， 通过滤波器网络和输出功率组合器，用于将来自全通滤波器网络的每个分支的信号功率重组，全通滤波器网络的至少一个分支可电可调谐以提供与 在输出功率组合器处要重新组合的分离信号功率的类似幅度用于拒绝但基本上吸收所选频率。

公开(公告)号：US10263605B2

公开(公告)日：2019-04-16

申请号：US15598087

申请日：2017-05-17

申请人： Cemin Zhang

发明人： Cemin Zhang

IPC分类号： H03K5/00 ,  H04B1/06 ,  H04B1/26 ,  H04B1/40 ,  H04B1/38 ,  H03L7/18

摘要： The invention discloses a frequency extender, including a preamplifier to receive a RF input signal and output a pre-amplified RF signal, a series frequency multiplier branch, a series frequency divider branch and a multiplexer. The output port of the preamplifier couples to one input port of the multiplexer. The series frequency multiplier branch and the series divider branch are coupled to receive the pre-amplified RF signal. The output port of each frequency multiplier in the series multiplier branch and/or the output port of each frequency divider in the series divider branch are coupled to the input ports of the multiplexer respectively. The multiplexer couples to receive the pre-amplified RF signal, the frequency-multiplied RF signal and the frequency-divided signal, the multiplexer selects a signal from the received signals and outputs a multiplexer output signal based on the selected signal.

公开(公告)号：US20180145667A1

公开(公告)日：2018-05-24

申请号：US15598087

申请日：2017-05-17

申请人： Cemin Zhang

发明人： Cemin Zhang

IPC分类号： H03K5/00 ,  H03L7/18

CPC分类号： H03K5/00006 ,  H03L7/18

摘要： The invention discloses a frequency extender, including a preamplifier to receive a RF input signal and output a pre-amplified RF signal, a series frequency multiplier branch, a series frequency divider branch and a multiplexer. The output port of the preamplifier couples to one input port of the multiplexer. The series frequency multiplier branch and the series divider branch are coupled to receive the pre-amplified RF signal. The output port of each frequency multiplier in the series multiplier branch and/or the output port of each frequency divider in the series divider branch are coupled to the input ports of the multiplexer respectively. The multiplexer couples to receive the pre-amplified RF signal, the frequency-multiplied RF signal and the frequency-divided signal, the multiplexer selects a signal from the received signals and outputs a multiplexer output signal based on the selected signal.

公开(公告)号：US20180145666A1

公开(公告)日：2018-05-24

申请号：US15598003

申请日：2017-05-17

申请人： Cemin Zhang

发明人： Cemin Zhang

IPC分类号： H03K5/00 ,  H03K21/02

CPC分类号： H03K5/00006 ,  H03K21/026

摘要： The disclosure discloses a multiplexer based frequency extender comprising a preamplifier to receive a RF input signal and output a pre-amplified RF signal, at least one frequency multiplier or at least one frequency divider, and a multiplexer. The multiplexer comprises multiple differential pairs, each differential pair comprises a corresponding bias current control circuit that switches ON or OFF a bias current flowing through a corresponding differential pair. The at least one frequency multiplier or the at least one frequency divider receives the pre-amplified RF signal and outputs a frequency-multiplied RF signal or a frequency-divided signal. The multiplexer couples to receive the pre-amplified RF signal, the frequency-multiplied RF signal and/or the frequency-divided signal, the multiplexer selects a signal from the received signals and outputs based on the selected signal a multiplexer output signal.

公开(公告)号：US20120212304A1

公开(公告)日：2012-08-23

申请号：US12932193

申请日：2011-02-18

申请人： Cemin Zhang ,  Michael Koechlin

发明人： Cemin Zhang ,  Michael Koechlin

IPC分类号： H03H7/00

CPC分类号： H03H7/0153 ,  H03H7/12 ,  H03H7/20 ,  H03H2007/013

摘要： This invention features an absorptive tunable bandstop filter with wide tuning range including first and second branches of all-pass filter networks, an input power divider for splitting the input signal and passing approximately half of the input signal power through each said branch of said all-pass filter networks, and an output power divider for recombining the signal power from each said branch of said all-pass filter networks, at least one of said branches of said all-pass filter networks being electrically tunable to provide an approximately 180° phase difference with similar amplitudes of the split said signal power to be recombined at said output power divider for rejecting but substantially absorbing selected frequencies.

摘要翻译： 本发明的特征在于具有宽调谐范围的吸收可调谐带阻滤波器，包括全通滤波器网络的第一和第二分支，输入功率分配器，用于分离输入信号，并将输入信号功率的大约一半通过所述全通滤波器网络的每个分支， 通过滤波器网络以及输出功率分配器，用于将来自所述全通滤波器网络的每个所述分支的信号功率重新组合，所述全通滤波器网络的所述分支中的至少一个可电可调谐以提供大约180°的相位差 所述分离的所述信号功率的类似幅度将在所述输出功率分配器处被重组，以便拒绝但基本上吸收选定的频率。

公开(公告)号：US10454419B2

公开(公告)日：2019-10-22

申请号：US15447764

申请日：2017-03-02

申请人： Cemin Zhang

发明人： Cemin Zhang

IPC分类号： H03B5/12 ,  H01L23/00 ,  H01L23/66 ,  H03B7/06

摘要： The invention discloses a voltage controlled oscillator (VCO) based on hybrid resonator, including a hybrid resonator and a negative resistance circuit, wherein the hybrid resonator includes the first LC series resonance branch, the second LC series resonance branch and the third LC series resonance branch. The first LC series resonance branch and the second LC series resonance branch forms a parallel structure, in which one end of the said parallel structure is grounded while the other end is connected to the third LC series resonance branch, and the other end of the third LC series resonance branch is connected to the negative resistance circuit. The resonance frequency of the first LC series resonance branch is lower than that of the second LC series resonance branch. The invented VCO can effectively improve the phase noise, especially maintain a good phase noise with the increase of the tuning frequency.

公开(公告)号：US10193519B2

公开(公告)日：2019-01-29

申请号：US15679690

申请日：2017-08-17

申请人： Cemin Zhang

发明人： Cemin Zhang

IPC分类号： H03H7/20 ,  H03H7/19 ,  H01P1/18

摘要： This invention relates to analog phase shifters, and more particularly, to analog phase shifters for controlling the phase of an RF signal over a wide range of frequencies with nearly linear phase change. An exemplary phase shifter includes a front end high-low pass filter, a back-end high-low pass filter, and an all-pass filter coupled in series between the two high-low pass filters. At least one of the filters is tunable for controlling the phase of an input signal over a wide range of frequencies. The high-low pass filter comprises low-pass filters as input and output interface for the high-low pass filter to facilitate impedance match for receiving and outputting RF signal.