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Electromagnetic Field Detector with IC UA741 or LF351. Daftar Persamaan Transistor PERSAMAAN TRANSISTOR KODE Transistor EROPA AMERIKA BC107. Diposting oleh ade anggaria di 06.30 Tidak ada komentar: Kirimkan Ini lewat Email BlogThis! Berbagi ke Twitter Berbagi ke Facebook Bagikan ke.
Here is a simple 3 band graphic equalizer circuit made of a single op amp IC LF351 (IC1) and few passive components.The component values of this circuit are not very critical and can be replaced with nearest values with a little loss on the performance.This feature make it easy to be assembled from your junk box. The opamp LF351 is wired to operate in three frequency ranges- high,medium and low.The circuit is designed such that the circuit produces +/-20 dB boost or attenuation for 50Hz,1KHz and 10Khz by varying POT’s R3, R6 and R9.The maximum amplification for any of these bands at maximum supply voltage is 20dB.The opamp LF 351 is wired as an inverting amplifier whose response to frequencies 50Hz,1Khz and 10KHz can be varied by adjusting POT’s R3,R6 and R9. Circuit diagram with Parts list.
The circuit can be operated from 6 to 24 V DC.What I recommend is 12V. Use a 12V battery or 12 V DC power supply for the circuit. All capacitors must be rated 15V. A 10uF/15V capacitor must be connected between +ve and -ve pins of LF351 if the power supply is far from the circuit.Not shown in circuit. The job of this capacitor is filtering and noise reduction (capacitor by passes high frequencies, making the DC supply more pure). If the power supply is very far away from the circuit, the supply wires may catch stray noises from the surroundings and this cannot be corrected by the filter and decoupling capacitors inside the power supply circuit.The capacitor connected across the supply lines will by pass these induces noises, making the circuit perform better.
Any way this is just an extra precaution and there wont be much problem in the practical performance of the circuit even if you don’t use this capacitor.
Pin Configuration Pin No. Pin Name Description 1.
Offset Null 1 Pin used for remove the offset voltage and balance input voltage. Inverting Input Inverting signal Input 3. Non-inverting Input Non-inverting signal Input 4. VEE Negative Supply Input (Ground) 5.
Offset Null 2 Pin used for remove the offset voltage and balance input voltage. Output Output of op amp 7. VCC Positive Supply Input 8. Not Connected Features. Low power consumption. Output short-circuit protection. High slew rate 16 V/us.
![Lf351 Lf351](/uploads/1/2/5/3/125395163/384951852.gif)
Low input-bias and offset current. Latch up free operation.
Internal Frequency compensation Technical Specifications. Voltage Supply: ±18V. Input Supply range: ±15V.
Differential Input Voltage: ±30V. Input Offset Voltage: 5mV.
Junction Temperature: 115℃. (Soldering) Lead Temperature: 260℃. Power Dissipation: 670mW LF351 Equivalents Op-amp ICs LM301, CA3140, TLC271, ICL7611, TLC071, TLC081, NTE857M (if input resistance is not a big issue) Where to Use LF351 IC?
LF351 is single operational amplifier with an internally compensated input offset voltage. It also provides wide bandwidth, low input bias current and offset current. Basically, LF351 is used in the circuits that need high input impedance, high speed integrators, Quick digital to analog converters, sample and hold circuits etc. How to Use the IC?
The below circuit diagram is used to generate the square wave, by adding few resistor and capacitor externally. It is like a Schmitt trigger circuit that the reference voltage for the comparator action depends on the output voltage.
For finding the value of the output frequency use the formula mentioned below: FOSC = 1 / 2RFCF Applications. Square Wave oscillator. High Q notch Filter. Sample and Hold Circuit. Fast Digital to Analog Converters.
High Seed Integrators 2D-model.