RLC circuit

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

System power distribution network theory and performance with various noise current stimuli including impacts on chip level timing

Abstract: Power Quality has become a determining factor in product performance and reliability. The reactive portions of the power distribution network (PDN) have a greater effect on power quality than DC IR drop. Resonance in the parallel inductance and capacitance network creates an impedance peak in the frequency domain and undesirable voltage noise in the time domain. The on-chip voltage noise is usually much higher than PCB PDN noise. A method of determining and simulating circuit parameters and comparing results to a target impedance is presented. A test vehicle has been built and measured to provide laboratory measured results for PDN voltage noise. Switching current patterns are defined which generate typical and pathological voltage waveforms. PRBS patterns are used as a characterization technique to provide reasonable worst case resonance stimulation. The voltage noise is responsible for measured timing and jitter degradation in logic circuits.

Repeater insertion in tree structured inductive interconnect

Abstract: The effects of inductance on repeater insertion in RLC trees is the focus of the paper. An algorithm is introduced to insert and size repeaters within an RLC tree to optimize a variety of possible cost functions such as minimizing the maximum path delay, the skew between branches, or a combination of area, power, and delay. The algorithm has a complexity proportional to the square of the number of possible repeater positions, permitting a repeater solution to be chosen that is close to the global minimum. The repeater insertion algorithm is used to insert repeaters within several copper based interconnect trees to minimize the maximum path delay based on both an RC model and an RLC model. The two buffering solutions are compared using the AS/X dynamic circuit simulator. It is shown that as inductance effects increase, the area and power consumed by the inserted repeaters to minimize the path delays of an RLC tree decreases. By including inductance in the repeater insertion methodology, the interconnect is modeled more accurately as compared to an RC model, permitting average savings in area, power, and delay of 40.8%, 15.6%, and 6.7%, respectively, for a variety of copper based interconnect trees from a 0.25 /spl mu/m CMOS technology. The average savings in area, power, and delay increases to 62.2%, 57.2% and 9.4%, respectively, when using five times faster devices with the same interconnect trees.

Resonant thermoelectric generator

Abstract: A resonant thermoelectric generator includes a thermoelectric power converter connected in series with a resonant circuit. A current generated by the thermoelectric power converter is cycled back and forth in the resonant circuit. The polarity of the thermoelectric power converter with respect to the resonant circuit is switched back and forth to correspond with the direction of the current. In a second embodiment, the thermoelectric power converter is coupled to the resonant circuit through a transformer, and its polarity is also switched to correspond with the direction of the current. In both embodiments, a negative retarding voltage that builds up in the thermoelectric power converter is eliminated by switching its polarity to always correspond with the direction of the current, so that energy is added to the resonant circuit in each cycle, and power is very efficiently converted from heat directly into electricity.

High-frequency high-order parallel resonant converter

Abstract: A novel approach to the analysis of design of a high-order high-frequency LCC-type capacitive coupled parallel resonant converter (PRC-LCC) operated in the continuous-conduction mode is presented. The presence of an additional capacitor in series with the inductance of the conventional PRC results in a converter with more desirable control characteristics. It is shown that, at switching frequencies lower than the resonant frequency, the gain of the LCC-type converter is lower than the grain of the conventional PRC. This facilitates the converter design with a lower turn-ratio transformer and therefore allows for a higher operating frequency. The complete state-plane diagram of the LCC-type converter, from which a set of steady-state characteristic curves is plotted, is given. Various design curves for component value selections and device ratings are given. A design example with computer simulation results is presented. >

Method and apparatus for supporting rlc re-segmentation

Abstract: A method and apparatus for radio link control (RLC) re-segmentation are disclosed. An original RLC protocol data unit (PDU) is generated from at least one RLC service data unit (SDU). The RLC PDU size is within a flexible maximum RLC PDU size. The original RLC PDU is stored in a retransmission buffer. If transmission of the original RLC PDU fails and the original RLC PDU size is larger than an updated maximum RLC PDU size, the original RLC PDU is segmented to segmented RLC PDUs. If transmission of one of the segmented RLC PDUs fails, the original RLC PDU may be re-segmented to smaller size RLC PDUs, or the segmented RLC PDU may be sub-segmented. Alternatively, the failed RLC PDU may be processes as an RLC SDU to generate encapsulating RLC PDUs for carrying the RLC PDU. Alternatively, an RLC SDU corresponding to the failed RLC PDU may be re-segmented.