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Download Design and Analysis of Integrator-Based Log-Domain Filter by Gordon W. Roberts, Vincent W. Leung PDF

By Gordon W. Roberts, Vincent W. Leung

Design and research of Integrator-Based Log-Domain FilterCircuits offers with the layout and research of log-domain clear out circuits. It describes numerous synthesis equipment that reduction the dressmaker in constructing bipolar or BiCMOS filter out circuits with cut-off frequencies starting from the low kilohertz variety to numerous 1000s of megahertz. filter out reaction deviations because of transistor-level nonidealities are systematically analyzed, resulting in potent digital repayment schemes. quite a few examples are supplied within the textual content with measured experimental info from IC prototypes. Design andAnalysis of Integrator-Based Log-Domain clear out Circuits is meant for engineers in examine or improvement, in addition to advanced-level engineering scholars. wide dialogue on filter out textual content metrics must also curiosity engineers who're accountable for checking out high-performance, high-speed analog or mixed-signal products.

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Extra info for Design and Analysis of Integrator-Based Log-Domain Filter Circuits

Example text

Therefore, we can write where is a dimensionless number denoting their area ratio. Most often, when the areas of the bipolar transistors are identical, or they are well matched for pairs of oppositely connected elements. 23) can then be rewritten as This last equation captures the essence of the translinear principle developed by B. Gilbert. To summarize, it is re-stated as follows [16]: “For any closed loop comprising any number of pairs of clockwise and counter clockwise forward-biased junctions, the product of currents for the elements in one direction is proportional to the corresponding product in the opposite direction.

As diodes demonstrate poor logarithmic characteristics, it was recommended that diode-connected (bipolar) transistors should be used. • In one of his circuit examples, it was suggested that amplitude control could be accomplished by varying the bias current through an anti-log diode (not shown here). Therefore, beside cutoff frequency, the dc gain of the log-domain filters can also be conveniently and electronically controlled. Adams has moved on and applied the log-domain concept to several more complicated circuits.

Therefore, we can write where is a dimensionless number denoting their area ratio. Most often, when the areas of the bipolar transistors are identical, or they are well matched for pairs of oppositely connected elements. 23) can then be rewritten as This last equation captures the essence of the translinear principle developed by B. Gilbert. To summarize, it is re-stated as follows [16]: “For any closed loop comprising any number of pairs of clockwise and counter clockwise forward-biased junctions, the product of currents for the elements in one direction is proportional to the corresponding product in the opposite direction.

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