A fully-active low-noise amplifier (LNA) for ultrawideband application is presented. Passive on-chip inductor of conventional LNA design is replaced by low-noise active inductor, significantly reducing the total chip area of the proposed CMOS LNA. The core LNA circuit is a cascoded common-source amplifier loaded with an active inductor. Two buffer stages are used to provide the required input a...

Abstract This paper reports on the fabrication and characterization of high quality factor (Q) copper (Cu) inductors with thick insulator on standard silicon (Si) substrate (ρ = 10–20 cm). The thickness and the area of the insulating layer are optimized for high Q by fabricating inductors on very thick (∼50 μm) embedded silicon dioxide (SiO2) islands and 4–20 μm thick PECVD SiO2 coated standard...

The synchronous buck circuit is in widespread use to provide “point of use” high current, low voltage power for CPU’s, chipsets, peripherals etc. In the synchronous buck converter, the power stage has a “high-side” (Q1 below) MOSFET to charge the inductor, and a “Low-side” MOSFET which replaces a conventional buck regulator’s “catch diode” to provide a low-loss recirculation path for the induct...

A circuit technique that reduces the boost-converter losses caused by the reverse-recovery current of the rectifier is described. The losses are reduced by inserting an inductor in the series path of the boost switch and rectifier to control the di=dt rate of the rectifier during its turn off. The energy from the inductor after the boost switch turn off is returned to the input or delivered to ...

The Designing of a single-inductor dual output (SIDO) fly-back power factor correction (PFC) converter is proposed, in which the multiplexing of a single-inductor is implemented with fly back converter through which each output can be regulated independently. The converter will be operating under in critical conduction mode (CRM).The efficiency along with power factor, total harmonic distortion...

The scope of this application note is to define the terminology associated with inductors and their applications. Some of these terms are listed in the component data sheets. Many terms go beyond the specification of inductors. These terms describe issues associated with inductor design and performance, magnetic materials and theory and applications. A thorough understanding of these terms and ...

This paper presents a physical model for planar spiral inductors on silicon, which accounts for eddy current effect in the conductor, crossover capacitance between the spiral and center-tap, capacitance between the spiral and substrate, substrate ohmic loss, and substrate capacitance. The model has been confirmed with measured results of inductors having a wide range of layout and process param...

This paper proposes an optimization methodology of on-chip spiral inductors. Characteristics of spiral inductors heavily depend on layout structures. We then formulate the characteristics with structural parameters and frequency as variables using a response surface method. The proposed method uses S-parameters to express inductor characteristics, and hence our method is independent of spiral g...

Inductor Inductor Capacitor (LLC) resonant converter has gained attention of researchers and engineers these days High efficiency, power density and Reliability. LLC resonant converter is most suitable resonant converter for front end DC-DC applications. Integrated magnetic, ZVS and high frequency operation, make the converter more compact and efficient. In this paper brief analysis of the LLC ...

A full-bridge converter which employs a coupled inductor to achieve zero-voltage switching of the primary switches in the entire line and load range is described. Because the coupled inductor does not appear as a series inductance in the load current path, it does not cause a loss of duty cycle or severe voltage ringing across the output rectifier. The operation and performance of the proposed ...