Questions tagged [switched-capacitor]
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35 questions
1 vote
0 answers
54 views
Input common mode for a switched capacitor integrator
I had a question about finding the input common mode of a differential switched capacitor integrator (shown in the figure below). The integrator is a conventional delaying integrator with two non-...
- 21
-1 votes
1 answer
117 views
Sample and hold with finite source impedance
Consider a voltage source connected to a single pole RC low pass filter. The output of the filter is connected to sampling circuit consisting of a switch and a capacitor. What is the sampled sequence ...
- 1,684
1 vote
3 answers
159 views
Can someone derive this switched-cap equation?
Source: Arizona State University lecture slides, course EEE 527 The teacher did not go over how to come up with Q = C(Vin - Vout) because we learned it in previous courses, but I don't remember it ...
- 119
0 votes
1 answer
351 views
Switched Capacitor: Divide by 2
I am having trouble understanding the advantage of the following switched capacitor circuit that divides the input voltage by 2. When the switch is in its initial position, C1 and C2 are in series ...
- 157
1 vote
1 answer
64 views
How do the switches and level translator work in the LMC7660 Switched Capacitor Voltage Converter [closed]
This is the block diagram of Texas Instruments LMC7660: Here 4 switches are used S1 to S4. The diagram shows source connection of only two transistors S1 and S2, and leaves out the S3 and S4 switch. ...
1 vote
1 answer
247 views
Two port feedback analysis of shunt-shunt amplifier with unity feedback
To consider the effect of loading in a shunt-shunt amplifier that is being analyzed with two port analysis, we short the feedback network at the input/output to calculate loading at the amplifier ...
- 1,684
1 vote
0 answers
90 views
Derivation Control to output transfer function of switched capacitor dc-dc converter approach valid?
For the control design, it is essential to have a plant model of the Switched-Capacitor-based DC-DC converter with a Voltage Conversion Ratio (VCR) of 1/3 implemented in a series-parallel topology. To ...
- 113
1 vote
1 answer
352 views
How does periodic steady state analysis find the transfer function of switched capacitor circuits?
The paper linked below suggests that periodic steady state (PSS) analysis is a way to find the transfer function of switched capacitor (SC) circuits. https://designers-guide.org/analysis/sc-filters....
- 1,684
0 votes
0 answers
342 views
Delay-Free Switched-Capacitor Integrator Difference Equation Derivation
I want to derive the difference equation of a delay-free SC integrator using charge-domain analysis. Here's the example I am following. This shows you that for charge domain derivation, all you need ...
- 558
0 votes
1 answer
197 views
Simulating frequency response of switched capacitor circuit
A web search of "simulate switched capacitor circuit" gives several results which suggest the use of periodic AC analysis to find the frequency response of a switched capacitor circuit. ...
- 1,684
2 votes
0 answers
160 views
LT1054 wrong output
I'm using a LT1054 to generate a negative voltage to power my OpAmp's. I used the circuit described in figure TA03 of the datasheet. My Vin is 15 V and my R1 and R2 are 20k and 220k respectively. With ...
2 votes
1 answer
492 views
How can switched capacitor converter be useful when its output is not regulated?
The charge-pump converter also known as switched capacitor converter and flying capacitor converter is a type of inductorless switching voltage source i.e SMPS. It can generate a voltage higher than ...
- 12.4k
0 votes
2 answers
498 views
Switched capacitors in an op-amp circuit
I am having trouble solving part (b) of this task. I would expect to achieve charge conservation equations, but considering that the inverting input of the op-amp is shorted with the output terminal ...
- 1
1 vote
1 answer
363 views
How does the FDC1004 (capacitance to digital converter) measure capacitance?
I am using the FDC1004 and wondering how it exactly measures capacitance. The datasheet is not explaining much. An associated application note contains a little more information, but still very little ...
- 313
0 votes
1 answer
369 views
Switched capacitor circuit - polarity of charge
Consider the following situation: There is a capacitor C1 (polarity does not matter). The 'top plate' of the capacitor is the one at the top of the diagram and has two ideal switches connected, one ...
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