Tsohon kashi zuwa kashi (V zuwa I Converters)

Wani shine Voltage to Current Converter (V to I Converter)?

Voltage to current converter (ko da ake kira V to I converter) shine tsakiyar gagarumin jirgin ruwa wanda yake iya aiki a kan zama shugaban voltage.

Amma, me kuke so ku fada wannan?

Ya, don tsakiyar gagarumin bayanai na hukuma, idan muna son samun halitta na abubuwa bace-bace (misali, miyakawa, tsafta, harwata), an fi sani amfani da DC current.

Saboda haka, DC current signals zai zama sama a cikin tsakiya daga masu aiki zuwa masu aiki. Amma, amfani da current sensing instruments ta da muhimmanci saboda ita ce mai karfi.

Saboda haka, yawanci an bukatar current wanda ya danganta ko ya dace da voltage na musamman.

Don haka, ana amfani da Voltage to Current Converters (ko da ake kira V to I converters). Wannan zai iya canza babban bayanai daga voltage zuwa current.

Simple Voltage to Current Converter

Idan muna tattaunawa game da ingantaccen voltage da current, ya kamata a tattara Ohm’s law.

Dukkanam suna sanin cewa, idan muna bayar voltage a kan tsakiya wanda yake da resistor, current proportional za a faru a cikinsa.

Saboda haka, resistor ne ke yi aiki a kan current flow a cikin voltage source circuit ko ya yi aiki a kan simple voltage to current converter (ko da ake kira V to I converter) don tsakiya linear.

Diagram na tsakiya wanda yake da resistor wanda yake yi aiki a kan simple voltage to current converter tana nan. A cikin wannan diagram, electrical quantities kamar voltage da current suna nufin da bars da loop respectively.

Amma, na zamani, output current na wannan converter ya danganta da voltage drop across the connected load in addition to the input voltage. Saboda, VR becomes. Saboda haka, ana ce wannan circuit ya danganta da imperfect one ko bad or passive version.

Voltage to Current Converter Using Op-Amp

An op-amp is implemented to simply convert the voltage signal to corresponding current signal. The Op-amp used for this purpose is IC LM741.

This Op-amp is designed to hold the precise amount of current by applying the voltage which is essential to sustain that current through out the circuit. They are of two types that are explained in detail below.

Floating Load Voltage to Current Converter

As the name indicates, the load resistor is floating in this converter circuit. That is, the resistor RL is not linked to ground.

The voltage, VIN which is the input voltage is given to the non-inverting input terminal. The inverting input terminal is driven by the feedback voltage which is across the RL resistor.

This feedback voltage is determined by the load current and it is in series with the VD, which is the input difference voltage. So this circuit is also known as current series negative feedback amplifier.

For the input loop, the voltage equation is

Since A is very large,