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Category: Converter Circuits / Voltage to Current Views: 5410 Rank: 0 The circuit in Figure 1 performs active voltage-to-current conversion or acts as a variable-gain current mirror with high precision and bandwidth. A typical application is testing high-speed ICs or other devices that have inputs designed to be driven from current-steering DACs to enable a modulated voltage source to control the devices. The circuit thus simplifies the testing of such devices in isolation, because modulated voltage sources are readily available, but modulated current sources generally are not.A further use of the circuit could be for easy and precise control of a current-controlled, variable-gain amplifier by using an adjustable dc voltage source at the input. Figure 1 shows the circuit configured as a voltage-to-current converter. The overall visit page. A further use of the circuit could be for easy and precise control of a current-controlled, variable-gain amplifier by using an adjustable dc voltage source at the input. Figure 1 shows the circuit configured as a voltage-to-current converter. The overall http://www.edn.com/article/CA233726.html
Related circuits Power-Saving Intermittent Converter This circuit switches its dc/dc converter, IC1, off whenever the large filter capacitor, C6, has suffic A simple voltage-to-current converter is shown in the figure. The current out is 0t or Vjn/R. For negative currents, a pnp can be used and, for better accuracy, a Darlington pah-can be substituted for the transistor. With careful design, this circuit can be used to control currents of many amps. Power voltage-to-current converter Low cost converter is capable of supplying constant ac currents Voltage-to-current converter II The circuit in Figure 1 performs active voltage-to-current conversion or acts as a variable-gain current mirror with high precision and bandwidth. A typical application is testing high-speed ICs or other devices that have inputs designed to be driven from current-steering DACs to enable a... Voltage-to-current converter drives white LEDs You sometimes need to drive a white LED from one 1.5V battery. Unfortunately, the forward voltage of a white LED is 3 to 4V. So, you would need a dc/dc converter to drive the LED from one battery. Using the simple circuit in Figure 1, you can drive one white LED or two series-connected green... V/I converter accommodates grounded load The voltage-to-current (V/I) converter in Figure 1 uses three common op amps, two medium-power transistors, and only a few passive components. The first op amp (IC1) inverts the sum of voltages VIN and VOUT to V1=-(VIN+VOUT). The second op amp (IC2) and transistors Q1 and Q2 invert this voltage... This 5-V circuit utilizes a servo-controlled dc/dc converter to generate the compliance voltage necessary for loop- Figure 1 shows a classic voltage-to-current (V/I) converter. You can select the resistor values such that the output current in the load, RL, varies only with the input voltage, VIN, and is independent of RL. The circuit is widely used in industrial instruments for supplying a 4- to 20-mA signal.... Boost voltage converter ranging from 1.5 to 15 ...
Medium-Voltage Power Converters and their Applications - Hirofumi Akagi
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