A computer implemented method of translation of verification commands of an electronic design, comprises the steps of receiving the electronic design, receiving at least one analog test harness model having at least one indirect branch contribution statement and having at least one of at least one stimulus parameter stored in at least one specification database and at least one measurement parameter stored in at least one specification database and at least one specification parameter stored in at least one specification database, translating the at least one indirect branch contribution statement into a plurality of direct branch contribution operators based at least in part upon the at least one analog test harness model and at least one of at least one stimulus parameter stored in at least one specification database and at least one measurement parameter stored in at least one specification database and at least one specification parameter stored in at least one specification database and generating a netlist based at least in part upon the translation.

One example includes a printed circuit board (PCB) structure. The PCB structure includes a first dereferenced microstrip and a first capacitor pad contacting the first dereferenced microstrip. The PCB structure includes a second dereferenced microstrip and a second capacitor pad contacting the second dereferenced microstrip. The PCB structure also includes a capacitor including a first terminal contacting the first capacitor pad and a second terminal contacting the second capacitor pad.

One example includes a machine-readable storage medium encoded with instructions. The instructions are executable by a processor of a system to cause the system to receive at least one target electrical characteristic indicating a target impedance of a passive printed circuit board (PCB) structure. The passive PCB structure is a component of a serial communication channel. The instructions are executable by the processor to cause the system to divide the passive PCB structure into a plurality of elements. Each element has an input and an output. The instructions are executable by the processor to cause the system to determine at least one parameter of each element such that an image impedance of the input and the output of each element equals the target impedance.

A computerized PCB coil circuit design system includes an input engine to receive PCB coil design parameters based on manufacturing rules including trace width and conductor thickness, to receive input parameters including LC sensor capacitance, coil shape, and number of coil layers, and to receive updates to any of the PCB coil design parameters or the input parameters. The system further includes a PCB coil solution generation engine to calculate output coil parameters including total inductance, sensor frequency, and Q factor as a function of the PCB coil design parameters and received input parameters, to graphically plot one selected output parameter as a function of one input parameter, and upon an update to one parameter selected from the parameters based on PCB manufacturing rule and input parameters, to recalculate the output coil parameters and to replot the one selected output coil parameter as a function of one input coil parameter.

A method for analog circuit design includes the steps of (A) simulating a plurality of initial designs of an analog circuit with a computer to generate a search space that contains a plurality of parameter values, (B) allocating to each of the parameter values (i) a respective designer weight and (i) a respective dynamic weight, (C) adjusting one or more of the dynamic weights of the parameter values in response to a failure to convert the initial designs of the analog circuit into a final design of the analog circuit to generate adjusted dynamic weights, and (D) ranking the initial designs of the analog circuit in response to said parameter values as weighted by the adjusted dynamic weights to identify a subset of the initial designs. The final design of the analog circuit is based on the subset of the initial designs of the analog circuit.

A method for electronic circuit spectral analysis includes receiving a list of parts for an electronic circuit, determining a part admittance matrix with algebraic nodes for each part, and determining a circuit admittance matrix for exterior nodes, interior nodes, and algebraic nodes based on the part admittance matrices. The method also includes reducing interior nodes of the circuit admittance matrix for exterior nodes, interior nodes, and algebraic nodes to determine a circuit admittance matrix for exterior nodes and algebraic nodes, reducing algebraic nodes to transform the circuit admittance matrix for exterior nodes and algebraic nodes into a Green's Function, evaluating the Green's Function to determine a circuit exterior node admittance matrix over a frequency spectrum, and transforming the circuit exterior node admittance matrix to a circuit scattering matrix over the frequency spectrum.

A method for determining electrical parameter values of the transistors of an analog circuit of a system on chip includes breaking the circuit down into a set of blocks connected to one another; establishing the wiring diagram of said circuit; defining a set of electrical constraints that are specific to said circuit, blocks and transistors of each block; defining electrical parameters of the circuit, block and transistors; selecting for each transistor of the circuit an operator for calculating the electrical parameter values of said transistor; generating structured diagrams of each block of the circuit from the defined constraints and the chosen operators; assembling said structured diagrams of blocks into a general diagram of the circuit; identifying whether there is any conflict; and, if so, emitting an alarm signal.

The present disclosure provides a method for improving the computational efficiency of an electromagnetic transients program (EMTP-type) phase domain synchronous machine model. The method comprises: acquiring a traditional phase domain synchronous machine model; acquiring matrix relations between mutual inductance matrices of stator windings and rotor windings according to a trigonometric transformation equation; substituting the matrix relations into the original expression of R.sub.eq and the original formulation of e.sub.h(t), respectively, and deriving to obtain a simplified formulation of the equivalent resistance matrix R.sub.eq and a simplified formulation of the total history term e.sub.h(t); and acquiring an efficient phase domain synchronous machine model. According to the embodiment of the disclosure, in the provided model, the equivalent resistance matrix of the phase domain synchronous machine model and the matrix used in the calculation of the history term are converted into constant sparse matrices, thereby improving the calculation efficiency of the model.

An approach for determining leakage current and threshold voltage for ensemble semiconductor devices, implemented in a computer infrastructure having computer executable code tangibly embodied on a computer readable storage medium having program instructions, are operable to: receive a number m of individual devices within an ensemble device; identify a sub-threshold slope; determine an uplift factor; separate random variation in logarithm of a leakage current into a correlated random component and an uncorrelated random component; determine a first standard deviation of correlated random component for the ensemble device; determine a second standard deviation of the uncorrelated random component for the ensemble device; generate a statistical model for electrical features of the ensemble device, based on the number m of individual devices, the sub-threshold slope, the uplift factor, the first and second standard deviation, and statistical random variables; and determine the electrical features of the ensemble device based on the statistical model.

A voltage controlled oscillator includes a resonator and an amplifier. The resonator includes a capacitive element and an inductive element. The inductive element has a plurality of conductive segments forming a physical loop. The inductive element has electrical connections on the physical loop to the plurality of conductive segments forming at least one electrical loop disposed within an interior space formed by the physical loop. The amplifier has an input and an output, the input coupled to a first conductive segment forming a first impedance and the output coupled to a second conductive segment forming a second impedance.