By Edwin W. Greeneich (auth.)
Analog built-in Circuits bargains with the layout and research of modem analog circuits utilizing built-in bipolar and field-effect transistor applied sciences. This e-book is acceptable as a textual content for a one-semester direction for senior point or first-year graduate scholars in addition to a reference paintings for working towards engin eers. complex scholars also will locate the textual content helpful in that the various fabric awarded this is now not lined in lots of first classes on analog circuits. integrated during this is an in depth insurance of suggestions amplifiers, current-mode circuits, and translinear circuits. compatible heritage will be primary classes in digital circuits and semiconductor units. This ebook comprises various examples, a lot of which come with advertisement analog circuits. End-of-chapter difficulties are given, many illustrating sensible circuits. bankruptcy 1 discuses the versions standard to symbolize units utilized in modem analog built-in circuits. provided are types for bipolar junction transistors, junction diodes, junction field-effect transistors, and metal-oxide semiconductor field-effect transistors. either large-signal and small-signal versions are built in addition to their implementation within the SPICE circuit simulation software. the fundamental development blocks utilized in a wide number of analog circuits are analyzed in bankruptcy 2; those encompass present resources, dc level-shift phases, single-transistor achieve levels, two-transistor achieve levels, and output phases. either bipolar and field-effect transistor implementations are provided. bankruptcy three bargains with operational amplifier circuits. The 4 easy op-amp circuits are analyzed: (1) voltage-feedback amplifiers, (2) current-feedback amplifiers, (3) current-differencing amplifiers, and (4) transconductance ampli fiers. chosen purposes also are presented.
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1-11 (b) and (b) the transistor cutoff frequency. 1 pF. Take room temperature = 26mV. Unknown is the forward transit time TF. Using Eq. 1) X 1O-12 F =32ps 1 rnA 22 Chapter 1 - Models for Integrated-Circuit Devices (a) From Eq. 026V The small-signal base resistance from Eq. 2mAN The output resistance from Eq. 5 rnA and from Eq. (1-41), the collector-base resistance is r lL = I3Fro = (150)(200kO) = 30MO From Eq. 814pF and, finally, from Eq. 1 pF (b) The new cutoff frequency from Eq. 2 Junction Diode Any of the pn junctions that comprise the bipolar transistor structure may be used as an integrated-circuit junction diode: the base-emitter junction, the base-collector junction, and the collector-substrate junction all produce viable diodes, each with differing characteristics .
2-3; this variation in current with voltage is characterized by the effective output resistance of the current source Ro. In the simple current source using the basic current mirror, this output resistance is simply the output resistance ro of the transistors. Several modifications to the basic current mirror can provide current sources with increased output resistance; one example is the cascade current source, illustrated in Fig. 2-8 for bipolar transistors. In this circuit, Q3 and Q4 form a basic current mirror, and a second mirror stage consisting of QI and Q2 is added in series.
32 (1971). Chapter 2 Analog Integrated-Circuit Blocks A typical analog integrated circuit is composed of several pieces of circuitry, each of which performs a specific circuit function contributing to the overall operation of the circuit. These basic circuit building blocks are common to a large variety of analog circuits and it is convenient to consider them individually. Figure 2-1 shows a two-stage operational amplifier circuit COp-Amp) and illustrates the individual building blocks that make up the circuit.
Analog Integrated Circuits by Edwin W. Greeneich (auth.)