61
Jingfeng Liu, Haotian Zhang, Hongwei Song: Systems and methods for semi-independent loop processing. LSI Corporation, Hamilton DeSanctis & Cha, August 7, 2012: US08237597 (70 worldwide citation)

Various embodiments of the present invention provide systems and methods for data processing. For example, a data processing circuit is discussed that includes an analog to digital converter circuit, a digital filter circuit, a data detector circuit, a mimic filter circuit, and a sample clock genera ...


62
Ka Yin Leung: Digital filter with decimated frequency response. Crystal Semiconductor, Gregory M Howison, J P Violette, December 9, 1997: US05696708 (70 worldwide citation)

A method for changing the frequency of a low-pass Finite Impulse Response (FIR) filter with a fixed frequency clock utilizes a decimation-by-coefficient technique. The decimation-by-coefficient method utilizes a single set of coefficients that are stored in a coefficient Read Only Memory (ROM) (64). ...


63
Croisier Alain, Esteban Daniel J, Levilion Marc E, Riso Vladimir: Digital filter for pcm encoded signals. International Business Machines Corporation, December 4, 1973: US3777130 (70 worldwide citation)

A digital filter either of a recursive or transversal type responsive to successive digitally encoded analog signal samples of m bits each. The filter comprises an accumulator for multiplying and summing a weighted hybrid value obtained from a memory medium addressed by a selected one of the m bits ...


64
Lane Allen Smith: System for digital filtering in a fixed number of clock cycles. Lucent Technologies, William H Bollman, January 16, 2001: US06175849 (70 worldwide citation)

An integrated circuit, e.g. an AC '97 conforming audio codec, includes a digital filter and gain module including multiple channels of gain control and multiple channels of digital filtering. A gain control module includes an overflow check of data samples requiring differing lengths of clampin ...


65
Tamal Bose, Howard Vincent Derby, Andrew Keith Levien, Anthony William Pankratz: Method and apparatus for measuring pressure in a coriolis mass flowmeter. Micro Motion, Duft Graziano & Forest P C, March 31, 1998: US05734112 (68 worldwide citation)

A method for determining pressure in an operating Coriolis effect mass flowmeter. The Coriolis flowmeter flow tubes are vibrated in both a bending mode (as is normal for measuring mass flow rate) and in a twisting mode. The ratio of the fundamental frequencies at which the flow tubes vibrate in each ...


66
Abraham Hasarchi, Alex Baber: Repeater with digital channelizer. Dekolink Wireless, Eitan Law Group, March 29, 2005: US06873823 (67 worldwide citation)

In order to retransmit a communication channel at a specific frequency, a receiver may receive a signal including the communication channel's specific frequency. An analog to digital converter may generate a digital signal correlated to the received signal and the digital signal may be passed throug ...


67
Yutaka Takahashi: Echo canceler having adaptive digital filter unit associated with delta-sigma modulation circuit. NEC Corporation, Sughrue Mion Zinn Macpeak & Seas, June 22, 1993: US05222084 (67 worldwide citation)

An echo canceler comprises an adaptive digital filter circuit for producing an echo replica signal on the basis of a transmit digital signal and a first digital signal indicative of a far-end signal, and an adder for eliminating the echo signal from a received signal with reference to the echo repli ...


68
Jonathan Herman Fischer, Lane Allen Smith: Recursive digital filter with reset. Lucent Technologies, William H Bollman, December 26, 2000: US06167415 (67 worldwide citation)

An integrated circuit, e.g. an Audio Codec (AC) '97 conforming audio codec, includes a digital filter and gain module including multiple channels of gain control and multiple channels of digital filtering. A gain control module includes an overflow check of data samples requiring differing lengths o ...


69
Heinz Gockler: Digital filter tree. ANT Nachrichtentechnik, Spencer & Frank, June 13, 1989: US04839889 (66 worldwide citation)

The invention relates to a digital filter tree composed of a plurality of digital filter banks arranged in a tree structure one behind the other to branch out in stages with a separation into L.sub..nu. individual signals taking place in each stage and the sampling rate being reduced each time by th ...


70
Ronald Carney: Multichannel wideband digital receiver making use of multiple wideband tuners having individually selectable gains to extend overall system dynamic range. David J Thibodeau Jr, December 31, 1996: US05590156 (65 worldwide citation)

A technique for extending the instantaneous dynamic range available in a wideband digital basestation for use in a wireless communication network. The basestation processes the bandwidth allocated to it in two or more sub-bands. The sub-bands are each processed by a digital tuner section consisting ...