JPS6399277U

JPS6399277U -

Info

Publication number: JPS6399277U
Application number: JP19500686U
Authority: JP
Priority date: 1986-12-18
Filing date: 1986-12-18
Publication date: 1988-06-27

Description

[Brief explanation of the drawing]

第１図はこの考案によるデイジタル電圧計の構
成図、第２図はこの考案によるデイジタル電圧計
のタイミング図、第３図は従来のデイジタル電圧
計の構成図、第４図は従来のデイジタル電圧計の
タイミング図である。図において、１は入力端子、２はのこぎり波電
圧発生回路、３は制御回路、４は比較回路、５は
ゲート制御回路、６はクロツクパルス発生回路、
７はゲート回路Ｘ、８は計数回路Ｘ、９は表示回
路、１０はゲート回路Ｙ、１１は計数回路Ｙ、１
２はデータ切替回路である。なお図中、同一また
は相当部分には同一符号を付して示してある。 Figure 1 is a configuration diagram of a digital voltmeter according to this invention, Figure 2 is a timing diagram of a digital voltmeter according to this invention, Figure 3 is a configuration diagram of a conventional digital voltmeter, and Figure 4 is a diagram of a conventional digital voltmeter. FIG. In the figure, 1 is an input terminal, 2 is a sawtooth voltage generation circuit, 3 is a control circuit, 4 is a comparison circuit, 5 is a gate control circuit, 6 is a clock pulse generation circuit,
7 is a gate circuit X, 8 is a counting circuit X, 9 is a display circuit, 10 is a gate circuit Y, 11 is a counting circuit Y, 1
2 is a data switching circuit. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

Claims

[Scope of utility model registration request]

In a digital voltmeter that counts pulses proportional to an input voltage, a clock pulse generation circuit that generates clock pulses, a sawtooth voltage generation circuit that generates a sawtooth voltage, and a comparison between the input voltage and the sawtooth voltage, a comparison circuit that generates a stop pulse when the two match;
two gate circuits that input the clock pulses of the clock pulse generation circuit and invert the pass blocking state every cycle of the output of the comparator; and two counting circuits that count the pulses that have passed through the two gate circuits; a gate control circuit that always complementarily controls the passage blocking state of the two gate circuits, and a switching circuit that appropriately switches and outputs the count values of the two counting circuits based on the output of the gate control circuit;
Of the two counting circuits, the switching circuit allows
A display circuit that displays the count value of the one that has completed counting, and a start pulse for the operation timing of the sawtooth voltage generation circuit, and also zeros the count values of the two counting circuits based on the output of the gate control circuit. 1. A digital voltmeter comprising: a control circuit that generates a pulse that resets the value of the display circuit; and a control circuit that generates a pulse that updates the display value of the display circuit.