Oblon, Fisher, Spivak, McClelland & Maier
Multiplier with hall element
 A multiplier with Hall element is provided with a Hall element with a pair of control current input terminals and a pair of Hall output terminals, means by which current is converted into magnetic field and the converted magnetic field is applied to the Hall element, and at the same time the voltage to be multiplied by the current is converted into control current and the converted control current is fed to control current input terminals, and a differential amplifier circuit including first and second operational amplifiers having non-inverted input terminals connected to the Hall output voltage terminals, and a third operational amplifier having non-inverted and inverted input terminals to which the output of the first and second operational amplifier is applied. The differential amplifier circuit removes the in-phase components of the Hall output voltage and then amplifies it. 
Tokyo Shibaura Electric Co., Ltd.
G
G06G
inventional
Shikei Tetsuji Noboru Haruo
Tanaka Kobayashi Matsuo Takahashi