Automatic gain control amplifier
专利汇可以提供Automatic gain control amplifier专利检索，专利查询，专利分析的服务。并且PURPOSE:To obtain a frequency characteristic equal to or higher than a conventional frequency characteristic by inserting a capacitor between the earth and the connection point of two PIN diodes connected in series. CONSTITUTION:A compensating capacitor 6-4 is connected between the earth and the connection point of PIN diodes 6-1and 6-2 in a variable attenuator 6. In an equivalent circuit of the variable attenuator 6, R and C indicate resistance components and junction capacitances of PIN diodes 6-1 and 6-2, and C0 indicates the capacitor 6-4 connected to the external, and R0 indicates a terminating resistance. In case of f=60MHz and 80MHz and C=2pf, a frequency characteristic L of the attenuation quantity is as shown in the figure, and the deviation of the attenuation characteristic at the time, when the diode resistance value is changed by 100-600OMEGA in case of C0=2-2.5pf, is about 0.1dB in 20MHz width, and about 0.6dB deviation for no compensation is reduced to about 1/6. Generally, amplifiers 1 and 3 whose frequency characteristics are flat in 60-80MHz are used, and therefore, said attenuation characteristic is the frequency characteristic of the AGC amplifier.，下面是Automatic gain control amplifier专利的具体信息内容。
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