Demystifying Switched Capacitor Circuits by Mingliang (Michael) Liu

By Mingliang (Michael) Liu

This e-book is helping engineers to understand primary theories and layout rules by way of offering actual and intuitive reasons of switched-capacitor circuits. quite a few circuit examples are mentioned and the writer emphasizes crucial and basic rules concerned about enforcing state of the art switched-capacitor circuits for analog sign processing and gear administration functions. in the course of the booklet, the writer provides quite a few step by step tutorials and offers functional layout examples.

While a few quantitative research is important to appreciate underlying techniques, tedious mathematical equations and formal proofs are shunned. An intuitive appreciation for switched-capacitor circuits is accomplished. a lot of the present info on modern switched-capacitor circuit functions is within the kind of purposes notes and information sheets for numerous switched-capacitor ICs. This booklet compiles such info in one quantity and coherently organizes and constructions it.

* step by step tutorials which emphasize the main basic principals
* Few tedious mathematical equations
* the 1st easy-to-understand compilation in this topic

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Extra resources for Demystifying Switched Capacitor Circuits

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05% in the cutting-edge CMOS technologies. 16). Capacitance Ratios versus Circuit Parameters In the previous development, we learned the relationship between the time constant t1 and the capacitance ratio (C0 /C). Furthermore, it is of practical interest to explore 35 Demystifying Switched-Capacitor Circuits the relationships of the following critical parameters: damping factor (sp), quality factor (Q), pole or center frequency (w 0), and maximum magnitude or voltage gain (G), with respect to capacitance ratios.

For the sake of brevity, the proof is left to the interested reader as an exercise (Hint: Consider the dimensions of system coefficients such as a and b [20]). As a rule of thumb in practice, for band-pass, low-Q ( Q < 1 2 ) low-pass, and low-Q high-pass biquads, the maximum gain is normalized to unity; while for high-Q (Q > 3) low-pass and high-Q high-pass biquads, the maximum gain is given by G ≈ Q [13][15][21]. 2 explored various SC resistor simulations and their advantages over the conventional diffused resistor implementation.

4 presents the design principles of CMOS sample-and-hold (S&H) circuits. The key performance parameters of S&H circuits are investigated, and several design examples are presented. 5 presents an overview of SC interpolators and decimators. 6. 2 Switched-Capacitor Resistor Simulation SC Resistor Simulations A physical resistor can be simulated by different passive SC elements. We start with the periodically reverse-switched capacitor [2], which is better known as the bilinear SC resistor simulation [3] (we shall see shortly why the term bilinear is used here).

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