| dc.description.abstract | With the fast evolution in semiconductor technology, mixed-signal system design is becoming a complex task that involves the heterogeneous integration of functions such as high-speed digital processing, memory, radio frequency circuits, sensors, micro-electro-mechanical systems, and optoelectronic devices. Noise isolation between different devices is thus a key issue in mixed-signal system designs. To deliver dc power to the core circuit, solid conductive layers in multilayered printed circuit boards (PCB) and package substrates are often used as the power delivery network (PDN), while the noise can easily propagate through such a parallel-plate waveguide like PDN.
A bandstop PDN circuit model along with the synthesis method and design equations are proposed in this work. Two bandstop structure, i.e., the resonant via structure and λ/4 line-based structure, are used to realize the proposed bandstop PDN circuit model. With the proposed equivalent-circuit model, design equations and design charts, the geometrical structure of them can be quickly designed according to the desired stopband bandwidth and isolation level. The synthesized bandstop PDN structures have been implemented and verified with circuit simulation, EM simulation, and measurement. A extremely wide stopband from 1.33 GHz to more than 40 GHz with 70 dB isolation is achieved.
With the integration demand of sensing, computing, and communication capabilities in a tightly integrated module, we believe that the proposed bandstop PDN are suitable for offering a low noise PDN in the mixed-signal systems, power integrity and good performance can thus be achieved. | en_US |