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    • 1. 发明授权
    • Digital ramp phase type optical interference gyro
    • 数字斜坡相位型光干涉陀螺仪
    • US5341210A
    • 1994-08-23
    • US92491
    • 1993-07-16
    • Kenji OgawaOsamu ItoyamaMotohiro IshigamiKenichi Okada
    • Kenji OgawaOsamu ItoyamaMotohiro IshigamiKenichi Okada
    • G01P3/36G01C19/72G01C19/64
    • G01C19/726
    • In a digital ramp phase type gyro in which a ramp signal RAM is produced by repeatedly accumulating step values sequentially generated corresponding to an input angular rate until the accumulated value exceeds a threshold value THR or -THR and the ramp signal RAM is used to modulate the phases of clockwise and counterclockwise light beams to cancel the phase difference therebetween, a comparing part 38 compares the threshold values THR and -THR and the ramp signal RAM and, when the ramp signal RAM exceeds either one of the threshold values THR and -THR, outputs the threshold value THR or -THR and a subtractor 41 subtracts the output threshold value from the accumulated value at that time, thereby causing a flyback of the ramp signal RAM. The output from a synchronous detector 23 at this time is latched as an error signal in a latch circuit 31 and the error signal is integrated by an integrating filter 32 to generate a correcting signal. The correcting signal is added to a reference value Er in a circuit 37 to produce corrected threshold values THR and -THR and the phase difference between the clockwise and counterclockwise light beams immediately prior to the flyback is always held to be 2n.pi. rad.
    • 在数字斜坡相位陀螺仪中,其中通过重复累积对应于输入角速率顺序产生的步长值直到累积值超过阈值THR或-THR而生成斜坡信号RAM,并且斜坡信号RAM用于调制 顺时针和逆时针光束的相位以消除它们之间的相位差,比较部分38比较阈值THR和-THR和斜坡信号RAM,并且当斜坡信号RAM超过阈值THR和-THR中的任何一个时, 输出阈值THR或-THR,而减法器41从该时刻的累计值中减去输出阈值,从而导致斜坡信号RAM的反激。 此时,来自同步检测器23的输出在锁存电路31中被锁存为误差信号,并且积分滤波器32积分误差信号以产生校正信号。 校正信号被添加到电路37中的参考值Er,以产生校正阈值THR和-THR,并且在回扫之前的顺时针和逆时针光束之间的相位差总是保持为2n pi rad。
    • 4. 发明申请
    • INJECTION-LOCKED-TYPE FREQUENCY-LOCKED OSCILLATOR
    • 注射锁定型频率锁定振荡器
    • US20140021987A1
    • 2014-01-23
    • US14008961
    • 2012-03-12
    • Kenichi Okada
    • Kenichi Okada
    • H03L7/083
    • H03L7/083H03L7/24H03L2207/06
    • Provided is an injection-locked-type frequency-locked oscillator capable of stable operation and exhibiting low phase noise. This injection-locked-type frequency-locked oscillator comprises: a locked loop (10) provided with a first injection-locked-type signal-controlled oscillator (14); and a second injection-locked-type signal-controlled oscillator (20). In the first injection-locked-type signal-controlled oscillator (14), an output frequency signal is made variable by an oscillation frequency control signal, and no reference clock signal is injected. In the second injection-locked-type signal-controlled oscillator (20), a reference clock signal corresponding to a reference clock signal of the locked loop (10) is injected, an oscillation frequency control signal corresponding to the same oscillation frequency control signal as the oscillation frequency control signal to the first injection-locked-type signal-controlled oscillation (14) is inputted, the circuit configuration is the same as that of the first injection-locked-type signal-controlled oscillator, and a desired frequency signal is outputted.
    • 提供了一种能够稳定运行并且表现出低相位噪声的注入锁定型锁频振荡器。 该注入锁定型锁频振荡器包括:具有第一注入锁定型信号控制振荡器(14)的锁定环(10); 和第二注入锁定型信号控制振荡器(20)。 在第一注入锁定型信号控制振荡器(14)中,通过振荡频率控制信号使输出频率信号变化,并且不注入参考时钟信号。 在第二注入锁定型信号控制振荡器(20)中,注入与锁定环路(10)的参考时钟信号相对应的基准时钟信号,对应于相同振荡频率控制信号的振荡频率控制信号, 输入到第一注入锁定型信号控制振荡(14)的振荡频率控制信号,该电路配置与第一注入锁定型信号控制振荡器相同,所需频率信号为 输出。
    • 5. 发明授权
    • Voltage-controlled oscillator
    • 压控振荡器
    • US08149067B2
    • 2012-04-03
    • US12782519
    • 2010-05-18
    • Kenichi Okada
    • Kenichi Okada
    • H03B5/12
    • H03B5/1228H03B5/1212H03B5/1243
    • A voltage-controlled oscillator that can achieve low phase noise while ensuring stable oscillation startup and stable oscillation maintenance even under low supply voltage conditions. The voltage-controlled oscillator includes an LC parallel resonant circuit, whose impedance varies with a control input voltage and a negative resistance circuit for introducing negative resistance into the LC parallel resonant circuit, wherein the negative resistance circuit includes at least: a first amplifier circuit, provided in parallel with the LC parallel resonant circuit and having a first pair of transistors cross-coupled via a capacitor, that achieves class-C amplifier operation by biasing the gate of each transistor in the first transistor pair with a first bias voltage; and a similarly configured second amplifier circuit that achieves class-C amplifier operation by biasing the gate of each transistor with a second bias voltage which is different from the first bias voltage.
    • 一个压控振荡器,即使在低电源条件下,也能确保稳定的振荡启动和稳定的振荡维护,从而实现低相位噪声。 压控振荡器包括LC并联谐振电路,其阻抗随着控制输入电压而变化,负电阻电路用于将负电阻引入LC并联谐振电路,其中负电阻电路至少包括:第一放大电路, 提供与LC并联谐振电路并联并且具有通过电容器交叉耦合的第一对晶体管,其通过以第一偏置电压偏置第一晶体管对中的每个晶体管的栅极来实现C类放大器的操作; 以及类似配置的第二放大器电路,其通过以与第一偏置电压不同的第二偏置电压来偏置每个晶体管的栅极来实现C类放大器的操作。
    • 6. 发明申请
    • WIDEBAND OSCILLATION CIRCUIT
    • 宽带振荡电路
    • US20110187469A1
    • 2011-08-04
    • US13019032
    • 2011-02-01
    • Kenichi OkadaShoichi Hara
    • Kenichi OkadaShoichi Hara
    • H03B5/12
    • H03B5/12
    • A wideband oscillation circuit outputting oscillation signals (divided signals) of continuous frequencies is disclosed and the wideband oscillation circuit includes an oscillator that outputs an oscillation signal, a filter that filters the oscillation signal output from the oscillator and outputs an injection locked signal, and an injection locked frequency divider that performs a free-run operation and outputs a divided signal of the oscillation signal while its oscillating operation is regulated by the injection locked signal, the division ratio of which varies in accordance with a control signal, wherein the filter generates the injection locked signal by controlling the passing characteristic that caused the oscillation signal to pass with respect to time in accordance with a filter control signal locked with the divided signal.
    • 公开了输出连续频率的振荡信号(分频信号)的宽带振荡电路,宽带振荡电路包括输出振荡信号的振荡器,对从振荡器输出的振荡信号进行滤波并输出注入锁定信号的滤波器, 注入锁定分频器,其执行自由运行操作,并且在其振荡操作由所述注入锁定信号调节的同时输出所述振荡信号的分频信号,其分频比根据控制信号而变化,其中所述滤波器产生 通过根据用分割信号锁定的滤波器控制信号控制使振荡信号相对于时间的通过特性的注入锁定信号。