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1. 发明授权

US08040173B2 Reference signal generator circuit with filter-less quadrature mixers for wide-band applications 有权
标题翻译：具有无滤波器正交混频器的参考信号发生器电路，用于宽带应用
公开(公告)号：US08040173B2
公开(公告)日：2011-10-18
申请号：US12704803
申请日：2010-02-12
申请人： Masayuki Ikebe , Eiichi Sano , Masato Koutani
发明人： Masayuki Ikebe , Eiichi Sano , Masato Koutani
IPC分类号： G06G7/12
CPC分类号： H03B27/00 , H03B2200/0078 , H03B2200/008
摘要： A first mixer circuit mixes a first center frequency signal with a first local oscillation signal to generate a second mixed signal, and mixes the first center frequency signal with a second local oscillation signal to generate a first mixed signal, and a second mixer circuit mixes a second center frequency signal with the first local oscillation signal to generate a fourth mixed signal, and mixes the second center frequency signal with the second local oscillation signal to generate a third mixed signal. An adder and subtracter circuit subtracts the third mixed signal from the second mixed signal to output a signal of subtraction result as a first upper side band signal, and adds the first mixed signal to the fourth mixed signal to output a signal of addition result as a second upper side band signal different in phase from the first upper side band signal by 90 degrees.
摘要翻译：第一混频器电路将第一中心频率信号与第一本地振荡信号混合以产生第二混合信号，并且将第一中心频率信号与第二本地振荡信号混合以产生第一混合信号，并且第二混频器电路将第二中心频率信号与第一本地振荡信号产生第四混合信号，并且将第二中心频率信号与第二本地振荡信号混合以产生第三混合信号。加法器和减法器电路从第二混合信号中减去第三混合信号，以输出相减结果的信号作为第一上边带信号，并将第一混合信号加到第四混合信号，以输出加法结果信号作为第二上边带信号与第一上边带信号的相位不同90度。

2. 发明授权

US4896122A Multiple bandwidth crystal controlled oscillator 失效
标题翻译：多带宽晶体振荡器
公开(公告)号：US4896122A
公开(公告)日：1990-01-23
申请号：US380047
申请日：1989-07-14
申请人： Omid Tahernia , Barry W. Herold , Kenneth R. Burch
发明人： Omid Tahernia , Barry W. Herold , Kenneth R. Burch
IPC分类号： H03B5/32
CPC分类号： H03B5/32 , H03B2200/0046 , H03B2200/008 , H03B2200/0082 , H03B2200/0094
摘要： A dual bandwidth crystal controlled oscillator is described having a first transconductance amplifier providing sufficient gain to maintain oscillation with an oscillator crystal at a minimum current drain. A second transconductance amplifier is provided which can be selectively coupled to the first transconductance amplifier, thereby augmenting the gain of the first transconductance amplifier to provide the capability for rapid oscillator start-up following battery saver operation. The dual bandwidth crystal controlled oscillator can be utilized in conventional oscillator and frequency synthesizer applications.
摘要翻译：描述了双带宽晶体控制振荡器，其具有提供足够增益的第一跨导放大器，以使振荡器晶体保持最小电流消耗的振荡。提供第二跨导放大器，其可以选择性地耦合到第一跨导放大器，从而增加第一跨导放大器的增益，以提供在节电器操作之后的快速振荡器启动的能力。双频带晶振控制振荡器可用于常规振荡器和频率合成器应用。

3. 发明授权

US11677433B2 Wireless system having local oscillator signal derived from reference clock output of active oscillator that has no electromechanical resonator 有权
公开(公告)号：US11677433B2
公开(公告)日：2023-06-13
申请号：US16152391
申请日：2018-10-04
申请人： MEDIATEK INC.
发明人： Jui-Lin Hsu , Chao-Ching Hung , Tzu-Chin Lin , Wei-Hsiu Hsu , Yu-Li Hsueh , Jing-Hong Conan Zhan , Chih-Ming Hung
IPC分类号： H04B1/26 , H04B15/00 , H04B1/403 , G01S7/03 , H03B5/12 , H03K5/135 , H04B7/26
CPC分类号： H04B1/403 , G01S7/03 , G01S7/032 , H03B5/12 , H03K5/135 , H04B7/2662 , H03B2200/008
摘要： A wireless system includes an active oscillator and a front-end circuit. The active oscillator is used to generate and output a reference clock. The active oscillator includes at least one active component, and does not include an electromechanical resonator. The front-end circuit is used to process a transmit (TX) signal or a receive (RX) signal according to a local oscillator (LO) signal. The LO signal is derived from the reference clock.

4. 发明申请

US20170244362A1 DUAL-FREQUENCY-OUTPUT CRYSTAL CONTROLLED OSCILLATOR 审中-公开
公开(公告)号：US20170244362A1
公开(公告)日：2017-08-24
申请号：US15401101
申请日：2017-01-09
申请人： NIHON DEMPA KOGYO CO., LTD.
发明人： Shigeyoshi MURASE , Masahiro KASHIWAMURA
IPC分类号： H03B5/32 , H03L7/18 , H03L1/00
CPC分类号： H03B5/32 , H03B19/14 , H03B25/00 , H03B2200/008 , H03L1/00 , H03L7/18
摘要： A dual-frequency-output crystal controlled oscillator includes a crystal resonator, an oscillator circuit, a first output terminal, a second output terminal, and a selection circuit. The crystal resonator includes an input terminal for measurement and an output terminal for measurement. The oscillator circuit is configured to amplify an output of the crystal resonator; a first output terminal configured to output a first frequency based on an output from the oscillator circuit. The second output terminal is configured to output a second frequency lower than the first frequency based on the output from the oscillator circuit. The selection circuit is configured to turn on/off an output of the first frequency. The input terminal for measurement is disposed such that a distance between the input terminal for measurement and the second output terminal is longer than a distance between the input terminal for measurement and the first output terminal.

5. 发明授权

US5767752A Frequency modulator with center frequency and modulation controlled by an input signal 失效
标题翻译：频率调制器，中心频率和调制由输入信号控制
公开(公告)号：US5767752A
公开(公告)日：1998-06-16
申请号：US702352
申请日：1996-08-23
申请人： Sang-Heum Yeon
发明人： Sang-Heum Yeon
IPC分类号： H03C3/09 , H03B1/00 , H03C3/00 , H03C3/02 , H03C3/14
CPC分类号： H03C3/02 , H03B2200/0026 , H03B2200/0058 , H03B2200/008 , H03B2201/02 , H03C2200/005
摘要： A frequency modulator controls the center frequency and modulation factor at the same time with one control signal. The frequency modulator includes a voltage-to-current converter that receives an input voltage signal to be modulated, a reference voltage signal, and a control voltage signal, and generates an output current signal by combining the input voltage signal and the control voltage signal. The input voltage signal is amplified by a transconductance amplifier. The control voltage signal is converted into a gain signal which is used to vary the transconductance of the amplifier. A voltage controlled oscillator generates a frequency modulated signal responsive to the output current signal. The center frequency and modulation factor can be controlled by adjusting the value of a resistor in the current-to-voltage converter, a capacitor in the voltage control oscillator, or the control voltage signal.
摘要翻译：频率调制器通过一个控制信号同时控制中心频率和调制因子。频率调制器包括接收要调制的输入电压信号的电压 - 电流转换器，参考电压信号和控制电压信号，并且通过组合输入电压信号和控制电压信号来产生输出电流信号。输入电压信号由跨导放大器放大。控制电压信号被转换成用于改变放大器跨导的增益信号。压控振荡器响应于输出电流信号产生调频信号。可以通过调整电流 - 电压转换器中的电阻值，压控振荡器中的电容器或控制电压信号来控制中心频率和调制系数。

6. 发明申请

US20180337635A1 METHOD AND CIRCUIT FOR EXCITING A CRYSTAL OSCILLATION CIRCUIT 审中-公开
公开(公告)号：US20180337635A1
公开(公告)日：2018-11-22
申请号：US15635635
申请日：2017-06-28
申请人： Beken Corporation
发明人： Jiazhou Liu , Yunfeng Zhao , Dawei Guo
IPC分类号： H03B5/30
CPC分类号： H03B5/30 , H03B5/32 , H03B2200/0008 , H03B2200/0012 , H03B2200/005 , H03B2200/0074 , H03B2200/008 , H03B2201/0275
摘要： A method and a circuit for exciting a crystal oscillation circuit are disclosed herein. The crystal oscillation circuit comprising: charging, with a charging circuit, a voltage-controlled oscillator; providing, with the voltage-controlled oscillator, an exciting signal; blocking, with a direct current blocking capacitor, direct current from the voltage-controlled oscillator to the crystal oscillation circuit; and exciting, with the exciting signal, the crystal oscillation circuit. The circuit for exciting a crystal oscillation circuit, comprising: a charging circuit; a voltage-controlled oscillator coupled to the charging circuit and configured to provide an exciting signal to the crystal oscillation circuit; and a direct current blocking capacitor connected between the voltage-controlled oscillator and the crystal oscillation circuit and configured to block direct current from the voltage-controlled oscillator.

7. 发明申请

US20180212593A1 CIRCUIT DEVICE, REAL-TIME CLOCKING DEVICE, ELECTRONIC APPARATUS, VEHICLE, AND VERIFICATION METHOD 审中-公开
公开(公告)号：US20180212593A1
公开(公告)日：2018-07-26
申请号：US15872200
申请日：2018-01-16
申请人： Seiko Epson Corporation
发明人： Toshiya USUDA
IPC分类号： H03K3/0231 , H03K5/26 , H03B5/36 , G06F1/14
CPC分类号： H03K3/0231 , G06F1/14 , H03B5/04 , H03B5/36 , H03B2200/004 , H03B2200/008 , H03B2201/0208 , H03K5/26
摘要： A circuit device includes an oscillation circuit that generates an oscillation signal by using an resonator, a clocking circuit that generates clocking data which is real-time clock information based on the oscillation signal, a verification data generation circuit that generates verification data for verifying the clocking data based on the oscillation signal, and an interface circuit that outputs the clocking data and the verification data.

8. 发明授权

US08390344B2 Method and circuit for waveform generation 失效
标题翻译：用于波形生成的方法和电路
公开(公告)号：US08390344B2
公开(公告)日：2013-03-05
申请号：US13076996
申请日：2011-03-31
申请人： John W. McCorkle
发明人： John W. McCorkle
IPC分类号： H03B19/00
CPC分类号： H03B19/00 , H03B2200/0072 , H03B2200/008
摘要： A programmable waveform generator, comprising: a controllable waveform generator configured to generate an initial bandwidth signal having an initial frequency bandwidth; a tone generator configured to generate a plurality of tone signals, each tone signal having a different frequency; a first bandwidth-multiplying circuit, including a first mixer having a first input port configured to receive the low-bandwidth signal; a first switch configured to choose one of the plurality of tone signals or a phase shifted version of one of the plurality of tone signals and output the chosen signal as a first chosen tone; a controller configured to control the operation of the bandwidth multiplying block, wherein the first mixer is further configured to receive the first chosen tone at a second input port, wherein the first mixer is further configured to mix the initial bandwidth signal and the first chosen tone to generate a first bandwidth signal at an output port, the first bandwidth signal having a first frequency bandwidth, wherein the first frequency bandwidth is greater than the initial frequency bandwidth, and wherein the first frequency bandwidth is an integer multiple of the initial frequency bandwidth.
摘要翻译：一种可编程波形发生器，包括：可控波形发生器，被配置为产生具有初始频率带宽的初始带宽信号; 音调发生器，被配置为产生多个音调信号，每个音调信号具有不同的频率; 第一带宽倍增电路，包括具有被配置为接收低带宽信号的第一输入端口的第一混频器; 第一开关，被配置为选择所述多个音调信号之一或所述多个音调信号之一的相移版本，并将所选择的信号输出为第一选择音; 控制器，被配置为控制所述带宽乘法块的操作，其中所述第一混合器还被配置为在第二输入端口处接收所述第一选择的音调，其中所述第一混合器还被配置为混合所述初始带宽信号和所述第一选择音为了在输出端口产生第一带宽信号，所述第一带宽信号具有第一频带宽度，其中所述第一频带宽度大于所述初始频带宽度，并且其中所述第一频带宽度为所述初始频带宽度的整数倍。

9. 发明申请

US20120274368A1 METHOD AND CIRCUIT FOR WAVEFORM GENERATION 失效
标题翻译：波形发生方法与电路
公开(公告)号：US20120274368A1
公开(公告)日：2012-11-01
申请号：US13076996
申请日：2011-03-31
申请人： John W. McCorkle
发明人： John W. McCorkle
IPC分类号： H03B19/00
CPC分类号： H03B19/00 , H03B2200/0072 , H03B2200/008
摘要： A programmable waveform generator, comprising: a controllable waveform generator configured to generate an initial bandwidth signal having an initial frequency bandwidth; a tone generator configured to generate a plurality of tone signals, each tone signal having a different frequency; a first bandwidth-multiplying circuit, including a first mixer having a first input port configured to receive the low-bandwidth signal; a first switch configured to choose one of the plurality of tone signals or a phase shifted version of one of the plurality of tone signals and output the chosen signal as a first chosen tone; a controller configured to control the operation of the bandwidth multiplying block, wherein the first mixer is further configured to receive the first chosen tone at a second input port, wherein the first mixer is further configured to mix the initial bandwidth signal and the first chosen tone to generate a first bandwidth signal at an output port, the first bandwidth signal having a first frequency bandwidth, wherein the first frequency bandwidth is greater than the initial frequency bandwidth, and wherein the first frequency bandwidth is an integer multiple of the initial frequency bandwidth.
摘要翻译：一种可编程波形发生器，包括：可控波形发生器，被配置为产生具有初始频率带宽的初始带宽信号; 音调发生器，被配置为产生多个音调信号，每个音调信号具有不同的频率; 第一带宽倍增电路，包括具有被配置为接收低带宽信号的第一输入端口的第一混频器; 第一开关，被配置为选择所述多个音调信号之一或所述多个音调信号之一的相移版本，并将所选择的信号输出为第一选择音; 控制器，被配置为控制所述带宽乘法块的操作，其中所述第一混合器还被配置为在第二输入端口处接收所述第一选择的音调，其中所述第一混合器还被配置为混合所述初始带宽信号和所述第一选择音为了在输出端口产生第一带宽信号，所述第一带宽信号具有第一频带宽度，其中所述第一频带宽度大于所述初始频带宽度，并且其中所述第一频带宽度为所述初始频带宽度的整数倍。

10. 发明授权

US5563531A Digital phase comparator 失效
标题翻译：数字相位比较器
公开(公告)号：US5563531A
公开(公告)日：1996-10-08
申请号：US306482
申请日：1994-09-15
申请人： Jacques Meyer
发明人： Jacques Meyer
IPC分类号： H03L7/06 , H03D13/00 , H03L7/085 , G01R25/00
CPC分类号： H03D13/00 , H03L7/085 , H03B2200/008
摘要： A digital phase comparator supplies digital values corresponding to the phase shifts between a first signal having a duty cycle of approximately 0.5 and a second signal. The comparator includes a one-way counter initialized at the frequency of the first signal and clocked by a clock signal having a high frequency with respect to the frequency of the first and second signals. A logic gate enables the counter when the first and second signals are in respective predetermined states. A phase shift is considered to be zero when it corresponds approximately to one half of the counter's capacity.
摘要翻译：数字相位比较器提供与具有约0.5的占空比的第一信号和第二信号之间的相移相对应的数字值。比较器包括以第一信号的频率初始化并由相对于第一和第二信号的频率具有高频的时钟信号计时的单向计数器。当第一和第二信号处于相应的预定状态时，逻辑门使能计数器。当相当于计数器容量的一半时，相移被认为是零。

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