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Electronic filter

About: Electronic filter is a research topic. Over the lifetime, 13207 publications have been published within this topic receiving 93063 citations. The topic is also known as: filter.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, a method was proposed to realize a first-order 2D all-pass transfer function with two delays and six multipliers, where the stability constraints on the coefficients of first order 2D filters were used to guarantee the existence of real-gain multipliers for the realized filter.
Abstract: A method is proposed to realize a first-order 2-D all-pass transfer function with two delays and six multipliers. Stability constraints on the coefficients of first-order 2-D filters are used to guarantee the existence of real-gain multipliers for the realized filter.

21 citations

Patent
24 May 1993
TL;DR: In this article, the frequency response-determining RC products of an RC component pair in the filter and an oscillator frequency determining RC component pairs in the RC oscillator are digitally programmable by an external microprocessor.
Abstract: An integrated circuit includes an analog-signal manipulating circuit (ASMC) such as a filter having a transfer function with a frequency response that is determined by at least one RC product. The integrated circuit also includes separately an RC oscillator. The frequency-response-determining RC products of an RC component pair in the filter and an oscillator frequency determining RC component pair in the RC oscillator are digitally programmable by an external microprocessor. The microprocessor holds the frequency of the RC oscillator fixed relative to its own crystal controlled oscillator by adjusting the programmable RC component pair of the RC oscillator. The same adjusting digital signal from the microprocessor is simultaneously applied to the programmable RC component pair(s) of the ASMC, which has the effect of stabilizing all RC component pairs and thus the ASMC frequency response. The capacitors of each RC component pair have binary-control-signal lines mutually parallel connected to each other. The microprocessor senses the frequency of the oscillator and by sending the appropriate binary control signal to the paralleled control lines to adjust the frequency of the RC oscillator to a predetermined value, the RC products of the other component pairs in the filter are adjusted to their respective predetermined values and maintained there during operation of the integrated filter circuit while subject to changes in temperature that would otherwise alter the RC products and therefore the transfer function of the ASMC.

21 citations

Journal ArticleDOI
R.J. King1
TL;DR: In this paper, a unity power factor rectifier with a parallel-resonant tank tuned to the second harmonic of the line frequency was analyzed for two filter configurations, and a design procedure was suggested, and complete experimental verification was obtained using a 120 V, 500 W. 60 Hz rectifier switching at 50 kHz.
Abstract: A unity-power-factor rectifier that has a parallel-resonant tank tuned to the second harmonic of the line frequency is analyzed for two filter configurations. A unidirectional-power-flow version of the current-sourced rectifier can operate stably open loop or can be current limited down to zero output voltage. The large inductor normally required is an outstanding disadvantage which can be partially overcome using a resonant filter. The design-oriented analysis includes variable-frequency operation and key component ratings. A design procedure is suggested, and complete experimental verification is obtained using a 120 V, 500 W. 60 Hz rectifier switching at 50 kHz. >

21 citations

Patent
04 Nov 2009
TL;DR: In this paper, an intelligent driving control method and device for a secondary synchronous rectifier is presented, which consists of a main circuit, a gate control filter circuit and an intelligent DR control circuit.
Abstract: The invention discloses an intelligent driving control method and device for a secondary synchronous rectifier. The intelligent driving control device comprises a main circuit, a gate control filter circuit and an intelligent driving control circuit. The main circuit comprises a synchronous rectifier; the gate control filter circuit filters a drain-source voltage Vds of the secondary synchronous rectifier, is formed by connecting a capacitor and at least one resistor in series and outputs a filter voltage from any node between the capacitor and the resistor, and the absolute value of the filter voltage is calculated to obtain an absolute value Vf; the intelligent driving control circuit receives the filter voltage Vf and the drain-source voltage Vds of the secondary synchronous rectifier and outputs a gate driving signal. The control method comprises the essential as follows: when the drain-source voltage Vds is less than a second reference voltage Vthr2 and the filter voltage absolute value Vf is greater than a third reference voltage Vthr3, a Q1 is connected; and when the drain-source voltage Vds is greater than a first reference voltage Vthr1, the Q1 is disconnected. By increasing the simple gate control filter circuit, reliable driving can be realized. The invention realizes intelligent driving and eliminates false triggering by adopting the mode of increasing a simple analog circuit.

20 citations

Journal ArticleDOI
TL;DR: In this paper, a frequency sextupling scheme based on a laser with an integrated Mach-Zehnder modulator (IMZM) was proposed for the millimeter-wave (mm-wave) signal generation in radio over fiber system.

20 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20237
202237
2021138
2020362
2019517
2018554