SU119927A1 - Voltage divider - Google Patents

Description

The measurement technique uses voltage dividers with a binary scale, containing a set of resistances connected by a star and forming a series of groups (decades) made up of four or five resistances, as well as a system of two-position keys, with which the required resistances are included in the circuit .

The proposed divider is more perfect since it provides the elimination of the circuit error and the possibility of changing the output voltage from zero to the value of the input voltage.

This is achieved by using switches with fixed contacts that are connected to different poles of the input voltage source (i.e., to different input buses) as the specified keys.

FIG. Figures 1 and 2 depict the proposed divider in two versions. The divider contains a set of resistances 1 connected by a star and forming a series of groups (decades) made up of four or five resistances. In addition, it has a system of two-position switches 2, which are switches, the fixed contacts of which are connected to the input buses 3 and 4, i.e., to the different poles of the input voltage source.

If the potential of the input bus 5 is taken as zero, the potential of the second rail 4 is equal to one, and the values of resistivity are proportional to the numbers 4; 2; 2; one; 0; four; 0.2; 0.2; 0.1, etc., then between the top of the star of the resistance and the zero thickness (i.e., at the output of the device, between the tires 5 and 5}, we obtain a voltage equal to

, 4Xi + 0.2X2 + 0.2X3 + 0.1X4 + 0.04X5 + 0.02Hb + ..., GxT, e, if this resistance is connected to the zero bus 3; X. 1, if this resistance is connected to the bus 4.

To reduce the absolute value of the resistances of the older decades, the divider resistance is divided into groups (Fig. 2) so that

N ° 119927-2 -

each group consists of a star-shaped system of relatively low impedance resistances Y and an additional resistance 6 connected between the top of the group and the output bus 5 of the divider. In this case, low impedance resistances 1 are selected; c so that they are proportional to the corresponding resistances in the divider according to the scheme of FIG. 1, and the total conductivity of the group between the ends of the resistances 1, the approach w; they to the switches 2 and the output stud 5 were equal to the same conductivity of the group of the same name in the divider according to the scheme shown in FIG.

To obtain a conventional decimal scale, the control of the switches in each decade must be carried out from one sheath; its drive element (for example, cam roller) with ten or eleven positions.

Subject invention

Claims (2)

1. A voltage divider ic with a binary-decimal scale containing a set of resistances connected by a star and arranged in a series of groups (decades) made up of four or five resistances each, as well as a system of two-position keys, by means of; the required resistances, characterized in that, in order to eliminate the circuit error and to enable the output voltage to change from zero to the input voltage, switches are used as specified switches, the fixed contacts of which are are connected to different poles of the input voltage source (i.e., different input buses). 2. In the divider of claim I, apply additional resistances connected between common points of resistance of the decades and the common output bus of the divider to reduce the absolute values of the resistances of the older decades. 3- Divider according to paragraphs. 1 to 2, characterized in that, in order to obtain a conventional decimal scale, one common drive element (e.g., cam roller) with ten or eleven positions is used to control the switches in each decade. The priority of claim 3 of July 21, 1958 LLL.T - -1-g-i -W-Vr-5- -4 ffilTO 1Ш 3 HSSHT