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本文介绍一种可用于多路载波系统的宽带调相器。目前在通讯卫星上应用时,其工作频率为23.5兆赫,灵敏度为2.38伏(均方根值)/弧度,通过降低调制输入端的闸门可使灵敏度达到最大值430毫伏/弧度。加调制信号时,其灵敏度的线性不超过直线的±7％,相当于调制指数偏离0.5弧度。调制频率在10赫至100千赫范围内时,灵敏度没有显著变化。在+5℃至+35℃温度范围内,用热敏电阻补偿电路使灵敏度的变化的±3％以内。 741运算放大器用于将相移部分与调制
This article describes a wideband phase modulator that can be used for multiple carrier systems. Currently operating on communications satellites, it operates at 23.5 MHz and has a sensitivity of 2.38 V (root mean square) / radian, providing a sensitivity of 430 mV / radians by reducing the gate at the modulation input. When the modulation signal is added, the linearity of its sensitivity does not exceed ± 7% of the straight line, which corresponds to a modulation index deviation of 0.5 radian. There is no significant change in sensitivity when the modulation frequency is in the range of 10 Hz to 100 kHz. Within ± 5 ° C to + 35 ° C, use a thermistor compensation circuit within ± 3% of the change in sensitivity. The 741 op amp is used to phase shift the part with the modulation