FT series dc to ac solar energy inverter
+
How a digital voltmeter works
Digital voltmeter is a precise electronic instrument, which is mainly composed of input circuit, A/D converter, logic control circuit, counter, decoding display circuit and power supply.
Its working process mainly includes the following three steps: first, input the DC voltage of the analog quantity; second, the A/D converter converts the analog DC voltage into the digital pulse output; The measured voltage value is displayed in digital form. It can be seen that the core of the digital voltmeter is the analog/digital conversion (A/D) circuit. The A/D converter directly or indirectly converts the measured voltage into a digital quantity proportional to it. In various digital voltages In the table, the most commonly used A/D converters are successive comparison and double integral converters.
How the successive comparison A/D converter works
Block diagram of successive comparison A/D converter. u1 is the converted analog input voltage, which is sent to the comparator through the input circuit. On the other hand, the reference voltage will be divided into several reference voltages u2 according to the 21-decimal code combination (such as "8421" BCD code) through the D/A converter controlled by the digital register, as the voltage "removing code", and at the same time Input to the comparator; under the control of the logic circuit, the measured voltage u1 and the reference voltage "remove code" are compared bit by bit from high to low.
Hot Tags: dc to ac solar energy inverter, China, manufacturers, suppliers, factory, customized, quotation, low price, buy discount, pricelist
Send Inquiry
