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Audio Filters Circuits
Audio Filters Circuits
Passive subwoofer filter
The schematic shown, does no need any power supply because is a simple low frequency passive filter. It could be usefull if you want to drive an extra subwoofer from your stereo system.
Audio compressor circuit
The amplifier drives the base of a common emitter PNP MPS6517 operating with a voltage gain of about 20. RL control varies the quiescent point of the transistor Q, so that varying amounts of signal exceed the level of V r, diode D 1 rectifies the positive peaks Ql output is only when these peaks are more larger than r V "'" 7. 0 volts. The...
Overload speaker protection circuit
The circuit input is taken from the terminal loudspeaker or amplifier output jacks. If the right channel is large enough to charge C1 to a potential which exceeds the breakdown voltage of the emitter of Ql, a voltage pulse appears in R7. Similarly, if the left channel signal is large enough to charge C2 to a voltage that is greater than the...
Q-multiplier filter circuit
This circuit is selective for the tuning adjustment between two closely spaced tones audio. The frequency is dependent on the selective value capacitors and resistors in the feedback circuit between the collector and base of Q1. With the values shown, the frequency can be "tuned" to a hundred cycles or so-around 650 Hz Ri and R2 should be...
12dB-oct by the OP amplifiers low-pass filter
12dB/oct Butterworth second port (most flat characteristic) of the filter circuit value is pregnant shall be 0.707 to get the characteristic flat, and for cl, the feedback capa
Measuring SN audio bandpass filter circuit
Since the filter has a zoom function, front satin amplifier magnification such as d = 10/2. 515 = 3,97, the beam of the total, compared with 10 times magnification.
Low-pass filter circuit diagram subwoofer
Many subwoofer low-pass filter circuit , this is just another. Circuit given here are based on discharge from ST Microelectronics shipped TL062. TL062 is a dual high input impedance J - FET operational amplifier with very low power
Cutoff frequency 48dB-octSCF low-pass filter circuit
In order to obtain wax dB / oct low pass filter of Butterworth times, the four 12dB / oct (2-order filter) block were four series, in order to obtain the flat characteristics of tanks, the opening value at all levels will be distribution,
Isolation transformer and low-pass filter wiring
47. (3) isolation transformer and the low-pass filter junction isolation transformer and the wiring between the low-pass filter as shown in FIG. Figure (b) is a low-pass filter forms.
The same capacitance parameters 12dB-oct low-pass filter
In this circuit, A = 1, port = o.5, passive vent filter without distinction. When only care when dry l; Q = 1 / (3 - A), 12dB / oct filter of Butterworth King F0.707,4 mouth may be assumed
Active low-pass filter LM102 schematic
Shown for the active low pass filter circuit. Cut-off frequency fc of the circuit = 10kHz. Circuit, R1 and R2 ratio and the ratio of C1 and C2 can be various values. This circuit uses R1 = R2 and C1 = 2C2. Using C1 = C2 and R1 = 2R2 can.
Active bandpass filter principle
Second order band-pass filter performance depends primarily on the quality factor Q and center frequency Si. In order to adjust the Q and. t a general first adjust R3 to change the Q value, and then adjust to change C 0. But the adjustment will affect R3 Si.
Four crystal diode switching circuit diagram of the IF filter
9-12V DC power applied to the control point A or point B, for amateur communication receiver IF amplifier, gives two different options. Power 455kHz, the bandwidth 500Hz, the f
A typical two high-pass filter circuit
A typical two high-pass filter circuit
By setting the cutoff frequency of the programmable digital low-pass filter
As can be seen from the circuit loop, the circuit is mainly two times a Butterworth filter, in order to make a 0.707, magnification feedback amplifier d was d 3- (1/Q) 1. 5860
ISO122 124 filter circuit diagram
As shown by ISO122/124 -type filter circuit shown in FIG. ISO122/124 modem internal oscillator frequency is set to 500kHz, in order to suppress from the DC/DC converter is any
Notch filter circuit diagram MC33171
As shown for the trap circuit. The circuit uses a high-performance op amp device MC33171 constitute trap. The device has a wide band and a high conversion rate. In the illustra
Power frequency noise filter PC822 schematic
As shown in FIG frequency power supply noise filter circuit. The circuit is a double-T filter, can be used to amplify (such as sensors) weak signal, to mixed 50Hz (or 60Hz) pow
Very low frequency active filter 5G28 schematic
As shown in FIG staggering low frequency active filter circuit. This is a fourth-order Butterworth low-pass active filters for filtered VLF random pulse noise voltage DC level
8 low-pass filter MAX291 TA7504P schematic
As shown in Figure 8 times the low-pass filter circuit. This circuit uses eight low-pass filter circuit switched-capacitor configuration. Changing the cutoff frequency of the c
Voltage-controlled voltage source second order band-pass filter circuit
Band pass filter allows only signals within a certain frequency range pass through rather than the pass band lower frequency than the upper limit of the low and high frequency
Band-pass filter is a circuit diagram of a single channel
Band-pass filter is a circuit diagram of a single channel described in this article, that the audio band-pass filter circuit diagram. Its fH 50Hz;, fl 13kHz, as shown below.
Audio band-pass filter
Band-pass filter used for a single channel, fH 50Hz;, fl 13kHz.
Second-order active band stop filter circuit
Band-stop filter (BEF) integrated operational amplifier, such electrical road performance and a bandpass filter contrary, that in a certain band, the signal can not be (or has
Broadband 0.1 to 10Hz filter amplifier
Broadband 0.1 to 10Hz filter amplifier Broadband circuit is composed of two operational amplifiers (0.1-10 Hz) filter amplifiers.
555 capacitor filter circuit diagrams
Capacitor filter works by the capacitance being measured is proportional to the pulse width and pulse width qualifying nominal capacitance comparing screening to detect. Circui
Stylus sand acoustic filter circuit diagrams
Circuit offers passband gain 1,10kHz corner frequency for eliminating high frequency noise such as hiss, ticking, popping sound.
Common low-pass filter circuit b
Common low-pass filter circuit commonly used low-pass filter circuit is shown. Figure (a) ~ (c) suppress high-frequency interference; Figure (b) of the varistor foot can absorb
High-End Audio Modular Preamplifier
This preamplifier is requirement result of many friends to give a high quality preamplifier, capable to drive high quality power amplifiers with good sound, it`s not however difficult to making, it combines simplicity and handiness. It does not allocate a lot of facilities and various filters, but is drawn so the acoustic signal follows the...
5 Band Graphic Equalizer
Another one unit of graphic EQ. five bands. The basic difference with the other circuits is, that I use instead of IC, transistor and the power supply, go up in +/- 24V DC, ensuring low distortion and bigger margins of overloading. With switch S1, we can isolate the EQ. inside or except operation, leaving the musical signal to pass without no...
10 Band Graphic Equalizer
The circuit of graphic equalizer, allocates ten adjusting potesometer , that each one from them affects in a predetermined area of frequencies, the central frequency of which abstains a octave (double), from the central frequencies of her neighbouring regions. Each unit has common materials with remainder and it differs only in the capacity of...
Lowpass filter uses only two values
The composite lowpass filter uses interior constant-k full sections terminated by m-derived half-sections.The design technique is also applicable to highpass and wideband filters (references 3 and 4). Figure 1 shows a schematic of the composite lowpass filter. The filter uses four inductors of two different values and five capacitors of two...
Audio Amplifier Circuits
Audio Oscillator Circuits
Audio Mixer Circuits
Audio Equalizer Circuits
Audio Tone Balance Circuits
Beeper Buzzer Circuits
Vacuum-Tube Valves Circuits
Musical & Effects Circuits
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
Digital Signal Integrity
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