By Allen Dewey (auth.), Alain Vachoux, Jean-Michel Bergé, Oz Levia, Jacques Rouillard (eds.)
Hardware description languages (HDL) reminiscent of VHDL and Verilog have chanced on their approach into virtually each element of the layout of electronic structures. considering their inception they steadily proved to be a vital a part of glossy layout methodologies and layout automation instruments, ever exceeding their unique targets of being description and simulation languages. Their use for computerized synthesis, formal facts, and checking out are sturdy examples.
to this point, HDLs were as a rule facing electronic platforms. even if, built-in platforms designed this day require progressively more analog elements corresponding to A/D and D/A converters, section locked loops, present mirrors, and so forth.
The verification of the whole process as a result asks for using a unmarried language. utilizing VHDL or Verilog to address analog descriptions is feasible, because it is proven during this e-book, however the genuine energy is coming from real mixed-signal HDLs that combine discrete and non-stop semantics right into a unified framework. Analog HDLs (AHDL) are thought of right here a subset of mixed-signal HDLs as they intend to supply a similar point of good points as HDLs do yet with a scope constrained to analog platforms, very likely with constrained help of discrete semantics.
Analog and Mixed-Signal Description Languages covers numerous points with regards to analog and mixed-signal description languages together with:
using a electronic HDL for the outline and the simulation of analog platforms The emergence of extensions of present general HDLs that offer real analog and mixed-signal HDLs.
using analog and mixed-signal HDLs for the advance of behavioral types of analog (electronic) development blocks (operational amplifier, PLL) and for the layout of microsystems that don't merely contain digital elements.
using a front-end instrument that eases the outline job with the aid of a graphical paradigm, but producing AHDL descriptions immediately.
Analog and Mixed-Signal Description Languages is the 1st booklet to teach how one can use those new description languages within the layout of digital elements and structures. it will be significant studying for researchers and architects operating in digital design.
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Extra info for Analog and Mixed-Signal Hardware Description Language
This demand is met by creating a new definitional type named Universal_Time, by analogy with Universal_Integer and Universal_Real. Universal_Time must have sufficient precision to represent each value of the physical type Time exactly. The representation is required to equal or exceed in precision the members of the floating point class of types. The simulation cycle is recast using values of Universal_Time for the kernel variables Tc, which represents the current simulation time, and Tn, which represents the next time that a driver will become active or a process will resume.
Discipline Effort Flow electrical voltage current thermal temperature heat flow rate hydraulic pressure volume flow rate translational velocity force rotational angular velocity torque Table 1: Effort and Flow Effects for Selected Physical Disciplines The constitutive equations of conservative systems are expressed by relating the across and through quantities of one or several branches. For example, a resistor has a single branch, and its constitutive equation (Ohm's law) relates the voltage across (the across quantity) and the current through the resistor (the through quantity).
3. 1 the models for thermal resistors and capacitors shown in Figure 7 are straightforward. Compared to their electrical counterparts (not shown) the only difference is in declaring a different nature for the two terminals. all; entity resistor_th is generic (r_th: Real); port (terminal p, m: Thermal); end entity resistor_th; library disciplines; use disciplines. thermal_system. 4. Diode with Self Heating The last model for this example implements the protection diodes of the quenching circuit.
Analog and Mixed-Signal Hardware Description Language by Allen Dewey (auth.), Alain Vachoux, Jean-Michel Bergé, Oz Levia, Jacques Rouillard (eds.)