Switched Capacitor Jitter

Uses a direct building block approach in the z domain of which there are two approaches. Each switching cycle transfers a charge from the input to the output at.

Brevet Us20050248395 High Speed Switched Capacitor

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Review And Comparison Of Clock Jitter Noise Reduction

Its functional principle and some mathematical basics are shown in figure 4.

Switched capacitor jitter. You can get performance similar to an analog rc op amp based filter using a switched capacitor topology while avoiding the need for an adc dsp and dac on a chip. The operation is as follows. The amplitude variation is a function of the jitter and the signal derivative see 1 when the input signal is a sine wave sampled at ts.

The effect of periodic clock jitter in switched capacitor filters is analyzed extending a previously introduced state space approach. The simplest switched capacitor sc circuit is the switched capacitor resistor made of one capacitor c and two switches s 1 and s 2 which connect the capacitor with a given frequency alternately to the input and output of the sc. Switched capacitor filters are a peculiar mix of analog and digital circuitry that require the user to take time to lay out the circuit board be it a breadboard or a board for the space station.

Convert the transfer function into a signal ow diagram consisting of ampliers delays and summers. The primary advantage of switched capacitor filters is that they can be easily implemented on an integrated circuit. It is composed of a switched capacitor filter an analog to digital converter adc.

This paper proposes the study of clock jitter effect on high q switched capacitor filter behavior. Generate the command signals. A command circuit made up by a ring voltage controlled oscillator vco with xor gates is used to.

This paper proposes the study of clock jitter effect on high q switched capacitor filter behavior. Uses switched capacitor integrators to simulate passive rlc prototype circuits rlc ladder networks for a desired lter realization 3. Capacitors are charged and discharged by periodically opening and.

A command circuit made up by a ring voltage controlled oscillator vco with xor gates is used to. To give this issue its proper. The switched capacitor feedback dac a transfers a very small charge toward the end of the clock phase leading to less clock jitter sesitivity compared to a current source feedback dac b.

All this hoopla is standard do as i say not as i do in most data sheets. This procedure facilitates the evaluation of the effects of the internally generated noise sources upon the output spectral density. The switched capacitor is a long known architecture that can be reliably and repeatably integrated into todays silicon technologies.

3 represents a first order discrete time sd modulator.

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