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  • Band Pass Filters

    2017-02-20 17:23:2062

    Band Pass Filter A band-pass filter is a circuit which is designed to pass signals only in a certain band of frequencies while attenuating all signals ...

  • 1_kHz_TONE_FILTER

    2017-02-20 15:06:0665

    The Wien-bridge based filter has a variable bandwidth and a center frequency of 900 Hz. The circuit will oscillate if the 10-kΩ pot is set too low....

  • ZOBEL_LOW_PASS_FILTER

    2017-02-20 14:16:5563

    Amide gives design procedure using Caver parameters. Both examples give 40 db attenuation at 5,000 cps when inserted between 600-ohm source and load re...

  • _HIGH_Q_NOTCH_FILTER

    2017-02-20 13:53:1661

    This circuit shows a twin-T network connected to an LM102 to form a high-Q, 60-Hz notch filter. The junction of R3 and C3 which is normally connected t...

  • TUNABLE_ACTIVE_FILTER

    2017-02-20 13:35:3363

    Circuit NotesThe high-pass and low-pass outputs cov-ering the range of 300 Hz to 3000 Hz have been summed in the fourth op amp to provide a notchoutput...

  • Designing Our First Filter

    2017-02-20 13:07:1061

    The first active filter must be the first order low pass. By simply reversing the filter components, this becomes a first order high pass. In each case...

  • Notch_filter_using_an_op_amp_as_a_gyrator

    2017-02-20 09:32:1467

    The center or notch frequency of this circuit is determined by the value of C1. Raytheon Linear integrated Circuits, 1989, p. 4-150....

  • Active Filter Types

    2017-02-20 09:29:5365

    Types of Active FiltersButterworth, Chebyshev, Bessel and Elliptic filters. There are basically 4 types of active  filters. They are butterworth, Cheb...

  • Infrasonic_filter

    2017-02-20 09:21:4262

    This circuit shows an LM833 connected as a filter for rejecting undesired infrasonic signals. The filter characteristic is 3rd-order Butterworth with t...

  • 45_kHz_LOW_PASS_STATE_VARIABLE_FILTER

    2017-02-20 08:55:3461

    Used In precision telephone-network active equalizer Camping value is 0.082, which requires 1% components. For high pass, take out-put from first opamp...

  • Circuit of a Low-pass Filter Composed of Same Parameters wit

    2017-02-20 07:49:4062

    As shown in the figure is the circuit of a low-pass filter composed of same parameters with 24 dB every octave. This circuit is a low-pass filters with...

  • First-Order Band-Pass Filter

    2017-02-20 07:35:1961

    Application of first order band pass filter to find out the output voltage gain magnitude of specific frequency . A specific range of frequency can pas...

  • Trapped wave filter circuit uses the operational amplifier a

    2017-02-20 06:48:0962

    The trapped wave filter circuit which uses the operational amplifier (composed of two LM110 or SN72310) as the voltage follower is as shown in the figu...

  • ACTIVE_BANDPASS_FILTER_f0_1000_Hz

    2017-02-20 06:37:3163

    This filter has a bandpass centered around 1kHz, for applications such as bridge amplifiers, null detectors, etc.The circuit uses a μA741 IC and stand...

  • First-Order Band-Pass Filter

    2017-02-20 05:05:1362

    Application of first order band pass filter to find out the output voltage gain magnitude of specific frequency . A specific range of frequency can pas...

  • PIN diode with band-pass filter switch circuit

    2017-02-20 04:33:2263

    The picture shows how to choose a variety of band-pass filters in the circuit, for which only the DC signal lines are between the panel and the circuit...

  • Voltage_controlled_low_pass_filter

    2017-02-20 03:46:4560

    This circuit performs as a unity-gain buffer amplifier at frequencies below cutoff, with the cutoff frequency being the point at which XC/gm equals the...

  • SPEECH_RECOGNITION_FILTER

    2017-02-20 03:02:2762

    Voice signal picked up by microphone is preamplified and sent through 3-kHz low-pass passive filter C1-R1 to 1-kHz high-pass active filter and 1-kHz lo...

  • SECOND_ORDER_LOW_PASS_FILTER_FOR_10_kHz

    2017-02-20 01:28:5661

    This circuit uses equal value capacitors, The cutoff frequency (fc) is...

  • IC_filter_with_programmed_cutoff_frequencies

    2017-02-20 01:22:0462

    This circuit shows an LTC1062 used with a dual four-channel MUX (74HC4052) and an LT311 to provide four different cutoff frequencies (500, 250, 125, an...

  • IF amplifier with a crystal filter circuit

    2017-02-20 01:06:2164

    The IF amplifier shown in the figure is based on the design of popular MC-1350P IC. The chip can be gotten by mail from the accessory store or from the...

  • BIQUAD_AUDIO_FILTER

    2017-02-20 00:15:2662

    This universal ftlter offers low-pass, high-pass, bandpass, band elimination, and all-pass functions.The Biquad consists of two successive integration ...

  • ANTIALASING_AND_SYNC_COMPENSATION_FILTER

    2017-02-19 23:37:2161

    Two dual-biquad filter ciUps and some external components form a multipurpose filter to reconstruct D/A converter signals. Connected to a converter’s...

  • SECOND_ORDER_VOLTAGE_CONTROLLED_FILTER

    2017-02-19 16:28:2361

    Desirable second-order voltage-controlled low-pass filter response can be achieved with this voltage-controlled filter (A). By using low-distortion, wi...

  • ACTIVE_BUTTERWORTH_R_C_FILTER

    2017-02-19 15:37:0561

    Article gives design procedure for selecting R and C values for active filters characterized by zero output either at zero frequency or at in infinite ...

  • CURRENT_DRIVEN_SALLEN_KEY_FILTER

    2017-02-19 14:59:0762

    The low-pass Sallen-Key filter is staple for designers because it contains few components (A).By redesigning the filter, a current to voltage conversio...

  • Single-peak Filter Circuit Composed of One Operational Ampli

    2017-02-19 14:26:3863

    The single-peak filter composed of one operational amplifier is shown in the figure. This circuit only uses one operational amplifier and a few compone...

  • High pass filter ( differentiator ) circuit

    2017-02-19 13:50:5561

    The circuit is the high-pass filter which is also used as pulse differentiator, output voltage is Ua and input voltage is Ue. Output voltage variation ...

  • The circuit diagram of high Q notch filter

    2017-02-19 13:04:4664

    This figure shows the circuit of high Q notch filter. The operational amplifier in the low figure comprise voltage follower. The potentiometer R4 can c...

  • Active_filter_having_a_bandpass_with_60_dB_gain_using_the_EC

    2017-02-19 12:35:5765

    Active filter having a bandpass with 60 dB gain using the ECG925. Typical supply voltage is ±15 volts, but it can be powered with supplies ranging fro...

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