JPH0447766U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the first embodiment of the present invention;
FIG. 2 is a circuit diagram of a second embodiment of the present invention, and FIG. 3 is a circuit diagram of a conventional absolute value circuit and its input/output characteristics. 1... Reference power supply, 2... First current mirror circuit, 3... Second current mirror circuit, 4... Third
Current mirror circuit, 5...Fourth current mirror circuit, 6...Fifth current mirror circuit, 7...Sixth current mirror circuit, 8...Seventh current mirror circuit, RB, R _r , R _in ... Resistor ,RO...
Output resistance.

Claims (1)

[Claims for Utility Model Registration] A reference power source 1 having a constant reference voltage, two resistors R _r connected in parallel to the reference power source 1 and dividing the reference voltage into two equal parts, and the reference power source 1 connected, the reference voltage is 2
At least two resistors R _{in which} are divided equally and are connected in series with the input AC power supply V in, and an element which is connected in series with the DC power supply V _cc that supplies current to each circuit with a resistor RB in between. A first current mirror circuit 2 composed of three elements, each of which is connected in series to each element constituting the first current mirror circuit 2 except for the element connected to the resistor RB. a third current mirror circuit 4 in which the collector current of one component increases during a negative cycle of the input AC power supply V _in ; and an element connected in series to the DC power supply V _cc with the resistor RB in between. a second current mirror circuit 3 made up of at least three elements including: an element constituting the second current mirror circuit 3 excluding the element connected to the resistor RB;
Each component is connected between the elements constituting the third current mirror circuit 4, and the collector current of one component increases in a positive cycle of the input AC power supply V _in . a mirror circuit 5; a current corresponding to an increase in the collector current of the constituent elements of the second current mirror circuit 3 is caused to flow through one element during a negative cycle of the input AC current V _in ;
a fifth current mirror circuit 6 that outputs the increased current to the other element; and a fifth current mirror circuit 6 that outputs the increased current to the _other element; and a fifth current mirror circuit 6 that outputs the increased amount of current to the other element; A current of is passed through one element,
a sixth current mirror circuit 7 that outputs the increased amount to the other element; and a seventh current mirror circuit that outputs the increased amount of the collector current based on the output current of the sixth current mirror circuit 7. 8, and a fifth in the negative cycle of the input AC power supply V _in
The output current of the seventh current mirror circuit 6 is passed in the positive cycle, and the output current of the seventh current mirror circuit 8 is passed in the positive cycle, and the output resistor RO outputs the absolute value voltage of the output voltage of the input AC power supply V _in . An absolute value circuit comprising: