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  2. Charge amplifier - Wikipedia

    en.wikipedia.org/wiki/Charge_amplifier

    Charge amplifier for piezoelectric sensors. Practical charge amplifiers usually include additional stages like voltage amplifiers, transducer sensitivity adjustment, high and low pass filters, integrators and level monitoring circuits. The charge signals at the input of a charge amplifier can be as low as some fC (FemtoCoulomb = 10 −15 C). A ...

  3. Level shifter - Wikipedia

    en.wikipedia.org/wiki/Level_shifter

    In digital electronics, a level shifter, also called level converter or logic level shifter, or voltage level translator, is a circuit used to translate signals from one logic level or voltage domain to another, allowing compatibility between integrated circuits with different voltage requirements, such as TTL and CMOS.

  4. Constant-voltage speaker system - Wikipedia

    en.wikipedia.org/wiki/Constant-voltage_speaker...

    600 watt transformers are widely available for contractors needing high power loudspeakers in constant-voltage installations. [12] Special-purpose transformers capable of handling 1250 watts down as low as 50 Hz are available. [4] One problem with high power, high current transformers is that fewer can be used on a single constant-voltage line.

  5. Transimpedance amplifier - Wikipedia

    en.wikipedia.org/wiki/Transimpedance_amplifier

    Transimpedance amplifier with a reverse-biased photodiode. In the circuit shown in figure 1 the photodiode (shown as a current source) is connected between ground and the inverting input of the op-amp. The other input of the op-amp is also connected to ground. This provides a low-impedance load for the photodiode, which keeps the photodiode ...

  6. Operational amplifier applications - Wikipedia

    en.wikipedia.org/wiki/Operational_amplifier...

    Combines very high input impedance, high common-mode rejection, low DC offset, and other properties used in making very accurate, low-noise measurements Is made by adding a non-inverting buffer to each input of the differential amplifier to increase the input impedance.

  7. Class-D amplifier - Wikipedia

    en.wikipedia.org/wiki/Class-D_amplifier

    A simple low-pass filter consisting of an inductor and a capacitor provides a path for the low frequencies of the audio signal, leaving the high-frequency pulses behind. The structure of a class-D power stage is comparable to that of a synchronously rectified buck converter , a type of non-isolated switched-mode power supply (SMPS).

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  9. Voltage converter - Wikipedia

    en.wikipedia.org/wiki/Voltage_converter

    A simple voltage dropper can be used to reduce the voltage for low-power devices; if more than 12V is required, or for high-powered devices, a switched-mode power supply is used. The output will usually be DC in the range 1.5–24 V. Power supplies that output either 100–120 V AC or 210–240 V AC are available; they are called inverters ...

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