RLC circuit

About: RLC circuit is a research topic. Over the lifetime, 14490 publications have been published within this topic receiving 142697 citations.

A resonant DC-to-DC converter operating at 22 megahertz

Abstract: An experimental DC-to-DC converter prototype based on a zero-voltage switching, resonant circuit topology is described. The converter is suitable for mounting directly on a circuit card. The unit provides a regulated 5 V output at power levels up to 50 W with an input between 40 and 60 V. The switching frequency is between 20 and 24 MHz, depending on the input voltage and load. Differential input and output ripple and EMI are extremely low and somewhat difficult to measure. The converter prototype has been designed to demonstrate compatibility with a fully automated assembly process based on surface-mount technology. Solutions are presented to a number of problems, including MOSFET gate-drive and rectifier diode capacitance, that have seriously limited the performance of high-frequency converters operating with useful input and output voltages. >

Low Frequency Pulsed Resonant Converter for Energy Harvesting

Abstract: A pulsed-resonant ac-dc converter and an integrated circuit (IC) controller have been designed, fabricated, and tested for harvesting energy from low-voltage (1.2V), low-power (1-100muW) energy transducers with output frequency in the 10-Hz-1-kHz range. Simulations using foundry models suggest that the silicon loss could be as low as 0.6muW, and the efficiency could reach 70%. With the IC experimentally packaged, the measured efficiency is between 50% and 70%, depending on the size and the loss in the resonant inductor

Design of Novel Compact Coupled Microstrip Power Divider With Harmonic Suppression

Abstract: A new microstrip power divider (PD) is proposed which consists of a pair of parallel coupled-lines (PCLs) on a defected ground, and its two outputs are connected by a resistor and a capacitor. The even/odd-mode analysis shows that the defected ground structure (DGS) etched on the ground plane of PCL is equivalent to a strong parallel resonance circuit in the case of even-mode, and a weak inductance in the case of odd-mode. So, this kind of additional reactance effect is used intentionally to design compact coupled microstrip PD with harmonic suppression. Also, the phase-delay through the PD is discussed, which is different from conventional one. A 0.9 GHz PD is developed and experimental results verify it has low insertion loss, good impedance matching and isolation. Furthermore, the third harmonic suppression of this PD is better than -35 dB and the overall area of divider is only 34% of the conventional case.

Radio ic device and radio ic device part

Abstract: It is possible to provide a radio IC device and a radio IC device part having stable frequency characteristic. The radio IC device includes: a radio IC chip (5); a feed circuit substrate (10) having the radio IC chip (5) mounted thereon and a feed circuit (16) containing a resonance circuit having a predetermined resonance frequency; and an emission plate (20) bonded to the lower surface of the feed circuit substrate (10) for emitting the transmission signal supplied from the feed circuit (16) and supplying the reception signal to the feed circuit (16). The resonance circuit is formed by an LC resonance circuit having an inductance element (L) and capacitance elements (C1, C2). The feed circuit substrate (10) is a multi-layer or single-layer rigid substrate and connected to the radio IC chip (5) and the emission plate (20) by DC coupling, magnetic coupling, or capacity coupling.

Dynamic Analysis and Control for Resonant Currents in a Zone-Control Induction Heating System

Abstract: This paper presents a quick and accurate power control method for a zone-control induction heating (ZCIH) system consisting of multiple working coils connected to multiple H-bridge inverters. A uniform temperature profile can be achieved by adjusting the current in each working coil. This paper proposes a new current control method based on a circuit model using real and imaginary (Re-Im) current/voltage components. The method detects and controls the Re-Im components of the coil current instead of the current amplitude and phase angle. As a result, the proposed method enables the inverters to control the coil current independently from the others. Experiments using a six-coil ZCIH system are conducted to verify the validity of the proposed method. The experimental results confirmed that the proposed method makes it possible to improve the stability of the current feedback control, not only in steady states but also in transient states.