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designing an uninterruptible power supply based on the high
designing an uninterruptible power supply based on the high

SiT1533 - SiTime
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... The SiT1533 is a replacement to the 32 kHz XTAL in the 2.0 x 1.2 mm (2012) package. Unlike XTAL resonators, SiTime’s silicon MEMS oscillators require a power supply (Vdd) and ground (GND) pin. Vdd and GND pins are conveniently placed between the two large XTAL pins. When using the SiTime Solder Pad ...
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... When rectified DC high-voltage is applied to the DRAIN pin during start-up, the MOSFET is initially off, and the CONTROL pin capacitor is charged through a switched high-voltage current source connected internally between the DRAIN and CONTROL pins. When the CONTROL pin voltage VC reaches approximat ...
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... When rectified DC high-voltage is applied to the DRAIN pin during start-up, the MOSFET is initially off, and the CONTROL pin capacitor is charged through a switched high-voltage current source connected internally between the DRAIN and CONTROL pins. When the CONTROL pin voltage VC reaches approximat ...
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... asymmetry of the system, necessary for rectification, is introduced by the applied voltage bias. The charge density injected into the wire from the leads is proportional to ␮L + ␮R and hence is different for the opposite signs of the voltage. If the injected charge density were independent of the vo ...
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Current source



A current source is an electronic circuit that delivers or absorbs an electric current which is independent of the voltage across it.A current source is the dual of a voltage source. The term constant-current 'sink' is sometimes used for sources fed from a negative voltage supply. Figure 1 shows the schematic symbol for an ideal current source, driving a resistor load. There are two types - an independent current source (or sink) delivers a constant current. A dependent current source delivers a current which is proportional to some other voltage or current in the circuit.
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