Download Design Methodology for RF CMOS Phase Locked Loops by Carlos Quemada PDF

By Carlos Quemada

Engineers face stiff demanding situations in designing phase-locked loop (PLL) circuits for instant communications because of part noise and different stumbling blocks. This functional ebook involves the rescue with a confirmed PLL layout and optimization technique that shall we designers examine their ideas, expect PLL habit, and advance competitively priced PLLs that meet functionality requisites it doesn't matter what IC (integrated circuit) demanding situations they arrive up opposed to. This uniquely entire toolkit takes designers step by step via operation rules, layout tactics, section noise research, structure issues, and CMOS realizations for every PLL construction block. It offers a pattern layout of an absolutely built-in PLL for WLAN purposes, demonstrating each step from specifications definition and circuit characterization to structure new release and circuit schematics.

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5 Fractional architecture using a dual-modulus divider. for a dual-modulus prescaler. 5). This value can vary between M and (M + 1) in fine steps using the correct choice of values A and B. 5) The resulting division ratio is sometimes denoted as N и f , where the point refers to a decimal point and N and f represent the integer and fractional parts of the division ratio, respectively. As previously mentioned, this type of architecture mitigates the need for the reference frequency to coincide with separation between channels.

1, January 2000, pp. 100–103. , H. Samavati, and T. Lee, ‘‘A CMOS Frequency Synthesizer with an InjectionLocked Frequency Divider for a 5-GHz Wireless LAN Receiver,’’ IEEE Journal of SolidState Circuits, Vol. 35, No. 5, May 2000, pp. 780–787. 2 PLL Fundamentals This chapter presents a review of PLL fundamentals. 1 is dedicated to presenting a building block diagram and the basic formulas of the most common PLL architectures (integer-N and fractional). 2 discusses the three main figures of merit selected as key points for PLL design: phase noise, spurious signals level, and lock time.

Taking into consideration the type of transistor used for the implementation of the LC-tank, another alternative classification can be done: NMOS, PMOS, and CMOS [15–18]. The following sections describe each one of these in more detail. 1 NMOS The active circuit of this configuration is formed by a pair of cross-coupled NMOS transistors. The main advantages of this configuration lie in its simplicity due to the reduced number of elements that form it, and consequently the noise that it contributes is minimal while providing high levels of linearity.

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