Topic
Butterworth filter
About: Butterworth filter is a research topic. Over the lifetime, 6187 publications have been published within this topic receiving 69070 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, a reconfigurable analog system is presented that implements pipelined ADCs, switched-capacitor filters, and programmable gain amplifiers, each block employs a zero-crossing based circuit for easy reconfigurability and power efficiency.
Abstract: A reconfigurable analog system is presented that implements pipelined ADCs, switched-capacitor filters, and programmable gain amplifiers. Each block employs a zero-crossing based circuit for easy reconfigurability and power efficiency. Configured as a 10-bit ADC, the chip consumes 1.92 mW at 50 MSPS with ENOB of 8.02 bit and FOM of 150 fJ/conversion-step. A second-order and a third-order Butterworth filter are also demonstrated. The thermal noise of the system is analyzed in different configurations and the dominant sources of noise are determined. It is shown that around 90% of the noise in ADC configuration is generated by the first stage, while in filter configuration, around 90% of the noise is generated by the last stage. The chip is implemented in a 65 nm technology.
21 citations
Patent•
23 Jul 2008TL;DR: In this article, a low pass filter includes a differential mode filter and a common mode filter, and the common mode portion of the filter includes at least one inductor and one capacitor.
Abstract: A low pass filter includes a differential mode filter and a common mode filter. The common mode portion of the filter includes at least one inductor and one capacitor, as well as a damping circuit with at least one capacitor. The low pass filter has a reduced weight, which is useful in circumstances in which weight is a significant factor, such as in aircraft.
21 citations
TL;DR: This paper presents theory and optical and computer experimental results to show that, with a spatial frequency carrier, the binary phase- only filter and the binary filter yield the impulse response of a continuous phase-only filter.
Abstract: In our previous paper we proposed using successively binary cosine and sine filters and combining the correlation intensities for rotation-invariant phase-only circular harmonic correlation. This paper presents an alternative method that uses a single filter. We present theory and optical and computer experimental results to show that, with a spatial frequency carrier, the binary phase-only filter [1, −1] and the binary filter [1, 0] yield the impulse response of a continuous phase-only filter. Compared with conventional computer-generated holographic filters, the binary phase-only filter and the binary filter have no representation-related error, require a minimum space–bandwidth product, and may be implemented in a spatial light modulator.
21 citations
TL;DR: In this paper, a general synthesis method for switched-current (SI) filter circuits is presented, which is obtained from the transpose of the signal-flow-graph (SFG) representation of a switched-capacitor (SC) filter realization.
Abstract: A general synthesis method for switched-current (SI) filter circuits is presented. The SI filter circuit is obtained from the transpose of the signal-flow-graph (SFG) representation of a switched-capacitor (SC) filter realization. The resulting SI circuits realized the same transfer function as the SC filter circuit and, in addition, possess identical component sensitivities. Since the operation of SFG transposition is sensitivity preserving, application of the proposed method to low-sensitivity SC filter circuits will produce low-sensitivity SI filter circuits. >
21 citations
TL;DR: In this article, a novel fractional spline filter is proposed for surface metrology, which combines arbitrary order fractional function with variational principle, and is endowed with an adjustability of transition characteristic.
21 citations