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1. 发明专利

JPS5732113A Logarithmic amplifier 失效
标题翻译：对数放大器
公开(公告)号：JPS5732113A
公开(公告)日：1982-02-20
申请号：JP10756380
申请日：1980-08-04
申请人： Advantest Corp
发明人： ASHITA HITOSHI
IPC分类号： H03G3/02 , H03G7/00 , H03G11/08
CPC分类号： H03G7/005
摘要： PURPOSE:To obtain an invariably accurate logarithmic amplification output by operating and storing an error in input and output characteristics in a memory previously, and by performing correcting operation by reading an error, corresponding to an input signal, from the memory. CONSTITUTION:A signal to be amplified from an input terminal 11 and a standard signal from an oscillator 16 are inputted selectively to a variable level adjuster 15 through a changeover switch 17, and a level-adjusted output is supplied to a logarithmic amplifier 12. This output is detected by detector 13 and then converted into a digital signal by an A/D converter 18. This digital signal is supplied to an arithmetic part 19, where the error of the amplifier 12 when the standard signal is supplied to the variable level adjuster 15 is calculated and stored in a memory 21 and the output of the A/D converter 18 when the signal to be amplified is applied to the adjuter 15 is corrected, thereby amplifying and outputting its correction arithmetic result through a D/A converter 22.
摘要翻译：目的：通过先前在存储器中操作和存储输入和输出特性的误差并通过从存储器读取对应于输入信号的错误来执行校正操作来获得一个不变的精确的对数放大输出。构成：通过切换开关17将从输入端子11放大的信号和来自振荡器16的标准信号选择性地输入到可变电平调整器15，并且电平调整的输出被提供给对数放大器12.这输出由检测器13检测，然后由A / D转换器18转换成数字信号。该数字信号被提供给运算部件19，当运算部件19将标准信号提供给可变电平调节器时，放大器12的误差 15被计算并存储在存储器21中，并且当要被放大的信号被施加到辅助器15时，A / D转换器18的输出被校正，从而通过D / A转换器22放大并输出其校正运算结果。

2. 发明专利

JPS5732133A Phase-synchronous oscillator 失效
标题翻译：相位同步振荡器
公开(公告)号：JPS5732133A
公开(公告)日：1982-02-20
申请号：JP10756480
申请日：1980-08-04
申请人： Advantest Corp
发明人： ASHITA HITOSHI
IPC分类号： H03L7/18 , H03L7/185
CPC分类号： H03L7/185 , H03L2207/10
摘要： PURPOSE:To obtain a phase-synchronous oscillator which has high frequency purity by synthesizing the frequencies of the output of a voltage-controlled oscillator and that of a local oscillator, and by increasing the output variations of the voltage- controlled oscillator by multiplying the resulting frequency. CONSTITUTION:The output frequency of a voltage-controlled oscillator 11 is mixed by a frequency converter 12 with the frequency of the local oscillation signal of a local oscillator 13. The output of the frequency converter 12 has its frequency multiplied by M by a multiplier 19, whose output is divided by N at a variable frequency divider 14. The output phase of the variable frequency divider 14 is compared with the phase of a reference signal by a phase comparator 16, whose output is supplied as a control signal to the voltage-controlled oscillator 11 by way of a low-pass filter 17. Therefore, the output variations of the voltage-control oscillator 11 are increased by M times by the multiplier 19, so that when the phase comparator 16 makes the comparison, the variations are detected sufficiently.
摘要翻译：目的：通过合成压控振荡器和本地振荡器的输出频率，获得具有高频纯度的相位同步振荡器，并通过将所得到的压控振荡器的输出变化量乘以频率。构成：压控振荡器11的输出频率由变频器12与本地振荡器13的本地振荡信号的频率混合。变频器12的输出频率乘以M乘以乘法器19 ，其输出在可变分频器14处除以N.可变分频器14的输出相位与相位比较器16的参考信号的相位进行比较，相位比较器16的输出作为控制信号提供给电压 - 控制振荡器11通过低通滤波器17进行控制。因此，通过乘法器19，电压控制振荡器11的输出变化增加M倍，使得当相位比较器16进行比较时，检测到变化充分地。

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