公开(公告)号：US5465044A

公开(公告)日：1995-11-07

申请号：US353951

申请日：1994-12-12

申请人： Yoshimitsu Matsumoto ,  Toshiaki Kansaku

发明人： Yoshimitsu Matsumoto ,  Toshiaki Kansaku

IPC分类号： G01R19/00 ,  G01R21/00 ,  G01R21/06 ,  G06G7/163 ,  H01L27/00 ,  G01R11/32 ,  G06G7/16

CPC分类号： G01R21/06 ,  G01R19/003 ,  G01R21/001

摘要： In an analog multiplying-averaging circuit for detecting very small mean power in a wide band and a wattmeter using the circuit, a first voltage signal is inputted to a base and a second voltage signal is inputted to a collector of one transistor circuit of a first differential amplifier, to supply a power corresponding to the multiplying-averaging of the two input signals to the collector of the transistor circuit. A base and a collector of another transistor circuit of the first amplifier are grounded to extract a DC collector voltage corresponding to junction temperature differences produced between the two transistor circuits from the collector of the other transistor circuit. A second amplifier is provided, which also has two transistor circuits. A base of one transistor circuit of the second differential amplifier is grounded. The second voltage signal is inputted to a collector of the one transistor circuit, and a base and a collector of another transistor circuit of the second amplifier are grounded to also extract a DC collector voltage corresponding to junction temperature differences of the two transistor circuits from the collector of the other transistor circuit of the second amplifier. From the two DC collector voltages, a signal corresponding to the multiplying-averaging of two input signals is obtained.

摘要翻译： 在用于检测宽带中的非常小的平均功率的模拟乘法平均电路和使用该电路的功率表中，将第一电压信号输入到基极，并且将第二电压信号输入到第一电压信号的一个晶体管电路的集电极 差分放大器，以将与两个输入信号的乘法平均相对应的功率提供给晶体管电路的集电极。 第一放大器的另一个晶体管电路的基极和集电极接地，以提取对应于来自另一个晶体管电路的集电极的两个晶体管电路之间产生的结温差的DC集电极电压。 提供了第二放大器，其还具有两个晶体管电路。 第二差分放大器的一个晶体管电路的基极接地。 第二电压信号被输入到一个晶体管电路的集电极，并且第二放大器的另一个晶体管电路的基极和集电极接地，从而提取对应于两个晶体管电路的结温差的直流集电极电压 第二放大器的另一晶体管电路的集电极。 从两个DC集电极电压获得对应于两个输入信号的乘法平均的信号。