公开(公告)号：MC2322A1

公开(公告)日：1993-10-25

申请号：MC2230

申请日：1992-06-12

Applicant: KOREA TELECOMMUNICATION

Inventor： M IL SONG HAN

IPC: G06G7/163 ,  G06N3/063 ,  H03F3/16 ,  G06F ,  H03B ,  H03K

Abstract: A MOSFET controlling multiplier for obtaining the precise function of the operational multiplication by offsetting the offset voltage of MOSFET to remove the non-linear current of MOSFET, utilizing symmetrical voltage sources and a current mirror circuit is disclosed. The MOSFET controlling multiplier utilizes a MOSFET linear means for linearly varying the output current I to a node A in accordance with an input voltage from an input voltage source Vg and a symmetrical input voltage from voltage sources Vx and -Vx. The input voltage from the input voltage source Vg is operatively associated with the symmetrical input voltage from the voltage sources Vx and -Vx. An impedance element Z outputs a voltage Vo, with the impedance element Z being connected to the node A of the MOSFET linear means and the ground.

公开(公告)号：MC2321A1

公开(公告)日：1993-10-25

申请号：MC2229

申请日：1992-06-12

Applicant: KOREA TELECOMMUNICATION

Inventor： M IL SONG HAN

IPC: G06G7/163 ,  G06N3/063 ,  H03F3/16 ,  G06F ,  H03B ,  H03K

Abstract: A MOSFET analog multiplier with a variable resistive MOSFET linear means for linearly varying output current I depending upon a symmetrical input voltage from voltage sources V2 and -V2 and an input voltage from an input voltage source V1 operatively associated with the symmetrical input voltage from the voltage source V2 and -V2, with the variable resistive MOSFET linear means having a node A to output the varied output current I therethrough is disclosed. An operational amplifying unit for amplifying the linearly varied output current I and which includes an operational amplifier U with an inverting input terminal connected to the node A of the MOSFET linear means, a non-inverting input terminal connected to ground, and an output terminal. The operational amplifying unit further includes a feedback element Z connected between the inverting input terminal and the output terminal of the operational amplifier U, where in use the output terminal outputs a voltage Vo.