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V/F Converter ICs Handle Frequency-To-Voltage Needs - 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: 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 :.....(design idea added 1/06) |
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V/I Curve Tracer - The V/I Curve Tracer is an indispensable tool for
troubleshooting circuits and testing components. The circuit traces the current versus
voltage curve for the component under test on an ordinary oscilloscope. The
peak-to-peak test voltage....(added 08/08/08) |
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VCO 1420MHz...2250MHz - (electronic circuit added 6/07) |
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VCO has Digitally Programmable Center Frequency - 04/25/96 EDN-Design Ideas:
(design idea added 3/03) |
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VCO Produces Positive & Negative Output Frequencies - 12/25/03 EDN-Design Ideas:
The circuit in Figure 1 is a quadrature-output VCO that provides both positive and
negative output frequencies, depending on the polarity of the control-voltage input.
The circuit provides a function that designers traditionally implement in analog
music-effects units, such as Bode/Moog frequency shifters.....(design idea added 1/05) |
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VCO Supply Touts Low Noise - 10/28/99 EDN-Design Ideas:.....(design idea added
11/05) |
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VCO test 1000MHz...1500MHz - (electronic circuit added 6/07) |
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VCO test 1300MHz...2400MHz - (electronic circuit added 6/07) |
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VCO uses Programmable Logic - 11/14/02 EDN-Design Ideas: A VCO (voltage-controlled
oscillator)is an analog circuit, so you cannot find it in the libraries for the design
of digital programmable chips. When you need such a circuit for synchronization or
clock multiplication, you need to find a circuit that works with the standard digital
functions, such as AND and NAND.....(design idea added 1/05) |
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VCO 1000MHz...1500MHz - (electronic circuit added 6/07) |
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VCO 1200MHz...2400MHz - (electronic circuit added 6/07) |
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VCO 144MHz...146MHz - (electronic circuit added 6/07) |
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VCO 15MHz...25MHz - (electronic circuit added 6/07) |
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VCO 350MHz...1000MHz - (electronic circuit added 6/07) |
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VCO 450MHz...1000MHz - (electronic circuit added 6/07) |
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Versatile Monolithic V/Fs can Compute as Well as Convert with High Accuracy -
National Semiconductor Application Note (app note added 2/06) |
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VFC Makes Simple Capacitance Meter - 06/07/01 EDN-Design Ideas:.....(design idea
added 1/06) When you develop the prototype of a circuit using capacitors or when you
replace an old, defective capacitor with a new one, you often need to know the value
of the capacitor you use or replace. At times, the values printed on the capacitors
are no longer readable. Also, the wide tolerance.... |
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Volt/F Converter Draws Flea Power - 04/24/97 EDN-Design Ideas: The V/F converter
in Figure 1 is unique because it draws less than 30 µA from one unregulated supply
while converting bipolar input voltages. It produces three CMOS-compatible,0to 10-kHz
outputs: one (F+)that becomes active when the input voltage is positive, another (F)that
takes.....(design idea added 1/06) |
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Voltage Controlled Switch using 555 - (electronic design added 6/07) |
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Voltage Controls Sine Wave Frequency - 08/17/95 EDN-Design Ideas: (design idea
added 3/03) |
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Voltage to Current Conversion Apex-AN13 - Apex App Note (added 08/08/08) |
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Voltage to Current Converter Makes a Flexible Current Reference - 09/18/03 EDN-Design
Ideas: 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.....(design idea added 12/04) |
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Voltage to Frequency Converter + 1us LED Pulse Driver - This circuit receives the
signal from the above amplifier and launches powerful 1uS infrared light pulses from a
low cost LED that are frequency modulated by the audio information. The 10KHz center
frequency of the pulse stream is low enough so a standard infrared LED can emit ten
times more light than conventional long pulse techniques. The circuit is described in
more detail in the transmitter section of my Handbook of Optical Through the Air
Communications. ….(designed by David A. Johnson) |
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Voltage-Controlled Resistor - A common request from SPICE users is a
voltage-controlled resistor. Although there's no SPICE component that directly models
this device, you can easily put one together. There's several ways to do it. You can
even extend the device to model more complex resistance functions like RTDs and
thermistors....(spice design added 02/09) |
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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.... (circuit design added 7/06) |
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Voltage-To-Frequency/Frequency-To-Voltage Converter - Microchip Application Note
Published 12-Nov-02 (app note added 2/06) |
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Wide Band Zero Cross Detector - This circuit was designed to convert a low
amplitude 40KHz signal into a clean square wave signal. It will work with inputs
as small as 5mv peak-to-peak or as large as 3 volts peak to peak. The input
frequency can range from a few kilohertz to about 150KHz. ….(designed by David A.
Johnson) |
