By Mingliang (Michael) Liu
This ebook is helping engineers to know primary theories and layout ideas by way of offering actual and intuitive causes of switched-capacitor circuits. a number of circuit examples are mentioned and the writer emphasizes an important and primary rules concerned about imposing state of the art switched-capacitor circuits for analog sign processing and tool administration purposes. through the publication, the writer provides various step by step tutorials and offers sensible layout examples.
While a few quantitative research is important to appreciate underlying suggestions, tedious mathematical equations and formal proofs are kept away from. An intuitive appreciation for switched-capacitor circuits is accomplished. a lot of the prevailing info on modern switched-capacitor circuit functions is within the type of functions notes and information sheets for varied switched-capacitor ICs. This ebook compiles such details in one quantity and coherently organizes and buildings it.
* step by step tutorials which emphasize the main primary principals
* Few tedious mathematical equations
* the 1st easy-to-understand compilation in this topic
Read Online or Download Demystifying Switched-capacitor Circuits Newnes PDF
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Additional resources for Demystifying Switched-capacitor Circuits Newnes
Within a clock period T). In other words, the effective cycle of polarity change is T1(T1 = T/2). , open/close) at a rate of 2fclk. 1(a) is given by 2fclk. Next we investigate why this configuration is often referred to as the bilinear SC resistor simulation. Let us first take a look at the frequency-domain description of the charge distribution by a resistor. 6) Here V0 is the voltage difference between two nodes, V1 and V2. 7), can be mapped directly to its corresponding z-domain equation that relates Q0 (z), V0 (z), and C by simply replacing s in the s-domain equation with its z-domain equivalence, F(z) .
1) At time t3, Φ1 is already off and Φ2 is just turned on, and switches 1 and 3 are open whereas 2 and 4 are closed. 2) At time t5, again, Φ1 is turned on instantly and Φ2 is already off, and switches 1 and 3 are closed whereas 2 and 4 are open. 3) Demystifying Switched-Capacitor Circuits From now on, the sequence of charge transfer between time t2 and t6 is repeated every T, and the system reaches a steady state. Under a steady-state condition, the average current that flows through the system is determined by the amount of charge transferred between, for example, time t2 and t6, which is equal to T.
Thus, this LDI also has a phase shift of p /2. , the only parasitic capacitance that matters), we again employ the principle of superposition. 2(d) is essentially composed of two subcircuits: an ideal series SC integrator with a switched capacitor of C and an ideal parallel SC integrator with a switched capacitor of Cp3. Note that the outputs of both circuits jump only when Φ1 → 1. 56) Thus, Cp3 causes the zero to deviate from the desired location. 2(d) using tools such as SWITCAP and verify the transfer function derived here.