Position: Index > Filter Circuit >
  • Low-pass filter (Integrator) circuit

    2017-02-27 01:49:0261

    The circuit is a simple low-pass filter, but also can be used as an integrator. When it is used as integrator, switch S1 is connected to input end, whi...

  • PASSIVE_CW_FILTER

    2017-02-27 01:27:3364

    Uses inexpensive 88-mH toroids to give very sharp 35-Hz bandwidth at 3 dB down. Filter has high insertion loss. Keyed waveshape has slow rise and fall,...

  • AUDIO AMP + 3KHz FILTER

    2017-02-26 23:47:2662

    This circuit is the audio amp section for a complete optical transmitter. The circuit amplifies and filters the voice audio signals from an electret mi...

  • AUDIO_FILTER_ANALYZER

    2017-02-26 23:47:1062

    When this circuit is connected to a filter and an oscilloscope, the scope displays the ftlter's frequency response. A frequency that sweeps from low to...

  • VARIABLE_FREQUENCY_AUDIO_BP_FILTER

    2017-02-26 22:51:0364

    This variable-frequency, audio bandpass filter is built around two 741 op amps that are connected in cascade. Tro 741 op amps are configured as identic...

  • High Q Band-pass Filter Circuit

    2017-02-26 22:15:5366

    As shown in the figure is a high Q bandpass filter circuit. This circuit uses two operational amplifiers SF356 with high input impedance, of which the ...

  • AUDIO_CLIPPER_FILTER

    2017-02-26 22:10:4860

    Improves seleetivity of communication receiver and prevents uncomfortablv loud volume in 500-ohm headphones. 88-mH toroid and 0.47-μF capaeitor form s...

  • All pass filters

    2017-02-26 21:44:5267

    An all-pass filter is that which passes all frequency components of the input signal without attenuation but provides predictable phase shifts for diff...

  • Three audio band-pass filters circuit

    2017-02-26 21:02:4163

    The figure as shown below is the complete set of three passive audio filters, which can be accessed or out of the circuit. These filters are designed f...

  • LOW_PASS_FILTER_PHASE_CORRECTOR

    2017-02-26 18:58:1860

    In some applications, it might be desired, or even be essential, that the bandwidth of the audio signal be limited, but that the phase relationship wit...

  • The circuit diagram of active low-pass filter(LM102)

    2017-02-26 17:34:0461

    The figure shows the circuit diagram of active low-pass filter (LM102).The cutoff frequency fc=10 kHz. In the circuit, the ratio of R1 to R2 or of C1 t...

  • Basic_F_V_converter_with_passive_filter

    2017-02-26 15:51:5162

    Fig. 12-21 This circuit is similar to that of Fig. 12-19, but with a passive filter added to reduce ripple. Typically, ripple is less than 1 mVp-p for ...

  • Second order active low-pass filter circuit

    2017-02-26 13:03:0368

    Quality factor indicates the state of bandpass filter. General requirement Q = 0.707.Then,we can get the following formula:Cut-off frequency w0 =w =1/R...

  • LowPass Filter

    2017-02-26 12:13:2062

    The schematic you find here comes from another site on the internet, but because it's on so many sites, we don't know who actually designed it. However...

  • Hum Filter (741) Circuit

    2017-02-26 10:30:1168

    The Hum Filter Circuit is showed in the picture. The circuit is an economical narrow-band notch filter. It does not need elements of high accuracy. The...

  • STATE_VARIABLE_ACTIVE_FILTER

    2017-02-26 10:24:1263

    A generalized circuit diagram of the two-pole state-variable active filter is shown. The state-variable filter can be inverting or noninverting and can...

  • The Value of Q and Frequency Adjustable Narrow-band Filter C

    2017-02-26 09:53:1263

    As shown in the figure is the value of Q and frequency adjustable narrowband filter circuit. This circuit shows an active narrowband filter whose value...

  • FET_AMPLIFIER_FOR_ACTIVE_FILTER

    2017-02-26 08:58:4966

    Meets gain stability and high input impedance requirements for use with third-order lowpass active filters. Uses bootstrapped source-follower. Drain of...

  • Filter Circuits – Active Filters

    2017-02-26 07:02:2461

    Introduction to Filters An electric filter is a network designed to attenuate certain frequencies but pass others without attenuation. A filter circuit...

  • Very simple low pass filter(integrator) circuit diagram

    2017-02-26 06:35:4562

    It is a simple low pass filter, it also can be used as integrator, when it is used as integrator, the switch S1 is connected to input terminal, and S2 ...

  • F_V_WITH_OUTPUT_FILTER_

    2017-02-26 06:23:1062

    Two-pole low-pass active filter improves dynamic range and response time of Raytheon 4152 frequency-tovoltage converter. Ripple in output is less than ...

  • TWIN_T_NOITCH_FILTER

    2017-02-26 05:43:2564

    This filter is used to reject or block a frequency or band of frequencies. These filters are often designed into audio and instrumentation systems to e...

  • Low Power Consumption Band-Stop Filter Circuit

    2017-02-26 04:47:1464

    In this circuit the ratio of R6 and R7 would determine the amplification factor Voo in very low frequency. If Vo=1, then the R7 can be cancelled in pra...

  • Second order active low-pass filter circuit

    2017-02-26 03:06:2261

    Quality factor indicates the state of bandpass filter. General requirement Q = 0.707.Then,we can get the following formula:Cut-off frequency w0 =w =1/R...

  • Voltage_controlled_state_variable_filter

    2017-02-26 01:32:5062

    This circuit uses both sections of an XR-13600 (Fig. 11-1B) to form a state-variable filter (with both low-pass and bandpass outputs). EXAR corporation...

  • Simple_5_Hz_filter_that_uses_back_to_back_capacitors

    2017-02-26 01:25:3762

    This circuit shows an LTC1062 connected with solid-tantalum capacitors to form a 5-Hz low-pass filter. Notice that no external clock is required. Linea...

  • PEAKING_FILTER_CIRCUIT

    2017-02-26 01:17:4964

    This circuit is basically a noninverting amplifier with positive feedback. The negative feedback is to unity by a direct connection between the output ...

  • Basic_crystal_filter

    2017-02-25 23:47:5062

    This circuit replaces the ceramic element of Fig. 7-10 with a 3.57-MHz quartz crystal. Figure 7-12B shows almost 30-dB attenuation only a few kHz on ei...

  • 45_MHz_notch_filter

    2017-02-25 21:17:4561

    This circuit shows an LH0033 buffer connected to form a notch filter. The frequency range is determined by the values of R1 and C1, as shown by the equ...

  • The Circuit of Active High-Pass Filter With Sharp Cutoff Per

    2017-02-25 21:17:3662

    Active high-pass filter with sharp cutoff performance is shown in this circuit. To improve the frequency characteristic around cutoff frequency fc of h...

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