Automated pre-placement phase as a part of robust analog-mixed signal physical design flow

Kote, Vlastimil; Kubacak, Adam; Vacula, Patrik; Jakovenko, J.; Hušák, M.

doi:10.1016/j.vlsi.2018.04.018

Cited by 1 publication

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, and according to [27], the criteria is that the higher the value of the FoM, the better the performance of the OTA. As the GBW is the objective function, the small-signal FoM s [5,40,41], is evaluated by (8), and the large-signal FoM l by (9).…”

Section: Feasible Sized Solutions Provided By Pso and Molmentioning

confidence: 99%

“…For instance, analog IC designers can use circuit simulators like SPICE (simulation program with IC emphasis) to evaluate electrical characteristics [1,2], which can be improved when the sizes of the MOS transistors are varied, and this process can be performed within an optimization algorithm. Some examples of optimization are-maximizing slew rate in CMOS amplifiers [3], minimizing power, noise [4,5], voltage [6], layout area [7][8][9], and so on. Therefore, as one can infer, due to the many target specifications, the many design variables and constraints, and the sparse ranges of the search spaces of every performance of an IC, then analog design automation tools are required to optimize CMOS ICs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sizing CMOS Amplifiers by PSO and MOL to Improve DC Operating Point Conditions

2020

View full text Add to dashboard Cite

The sizes of the metal-oxide-semiconductor (MOS) transistors in an operational amplifier must guarantee strong direct current operating point (DCOP) conditions. This paper shows the usefulness of two population-based optimization algorithms to size transistors, namely—particle swarm optimization (PSO) and many optimizing liaisons (MOL). Both optimization algorithms link the circuit simulator SPICE to measure electrical characteristics. However, SPICE provides an output-file indicating that a transistor is in strong inversion but the DCOP can be in the limit, and it can switch to a different condition. In this manner, we highlight the application of PSO and MOL to size operational transconductance amplifiers (OTAs), which DCOP conditions are improved by the introduction of a procedure that handles constraints to ensure that the transistors are in the appropriate DCOP. The Miller and RFC-OTA are the cases of study, and their sizing is performed using UMC 180 nm CMOS technology. In both OTAs, the objective function is the maximization of the gain-bandwidth product under the main constraint of guaranteeing DCOPs to improve two figures of merit and to provide robustness to Monte Carlo simulations and PVT variations.

show abstract