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1 Hz to 100 MHz VFC Features 160 Db Dynamic Range: 09/1/05
EDN -Design Ideas / (added 11/05) Transform voltage to current over wide frequency, amplitude. |
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1 Hz to 100 MHz VFC Features 160 Db Dynamic Range: 9/1/05 EDN
Design Ideas / (added 10/06) Transform voltage to current over wide frequency, amplitude. |
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AN-1244: Photo-Diode Current-To-Voltage Converters: National Semiconductor
Application Note (app note added 2/06) |
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Circuit Performs High Speed Voltage to Current Current to Current
Conversion: 07/25/02 EDN Design Ideas / (added 1/05) The circuit in Figure 1performs 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.... |
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Design Formulas Simplify Classic V/I Converter: 01/20/00
EDN-Design Ideas / (added 7/03) |
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Photo-Diode Current-To-Voltage Converters: National Semiconductor Application
Note (app note added 2/06) |
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V/I Converter Accommodates Grounded Load: 06/10/99 EDN-Design
Ideas / (added 1/06) 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 to produce VIN+VOUT. The formula for calculating the output current is thus:... |
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Voltage to Current Converter Drives White LEDs: 06/27/02 EDN
Design Ideas / (added 1/05) 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 LEDs, using only a few components.... |
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Voltage to Current Converter Makes a Flexible Current Reference:
09/18/03 EDN Design Ideas / (added 1/05) The voltage-to-current converter in Figure 1 can both source and sink current. The circuit is more
flexible than some traditional current references that require different topologies for current sourcing and sinking. Also, you can easily
adjust the value of the current reference by simply adjusting the circuit's input voltage.... |
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Voltage-controlled stereo signal attenuator: This is a voltage-controlled stereo signal attenuator. A 30-volt DC control voltage (the
300-ohm pot functions as a lamp-dimmer) energizes a lamp (I'm guessing the General Electric #313 is an ordinary miniature incandescent bulb)
which radiates light energy onto the two "LOR 1-C" components. These are variable resistors (some sort of photocell) which are in the signal
path of each of the two channels. SO the single D.C. control voltage affects the two audio channels simultaneously.... (circuit design added
7/06) |
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Voltage-To-Current Conversion Amplifier: How
to transform the passive voltage-to-current converter into an active
one. (added 4/08) |
