JPS5735408A - Digital filter device - Google Patents

Digital filter device

Info

Publication number
JPS5735408A
JPS5735408A JP10974780A JP10974780A JPS5735408A JP S5735408 A JPS5735408 A JP S5735408A JP 10974780 A JP10974780 A JP 10974780A JP 10974780 A JP10974780 A JP 10974780A JP S5735408 A JPS5735408 A JP S5735408A
Authority
JP
Japan
Prior art keywords
gain coefficient
gain
data
coefficient
overflow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP10974780A
Other languages
Japanese (ja)
Other versions
JPS6337976B2 (en
Inventor
Kotaro Hanzawa
Shigenori Sano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Casio Computer Co Ltd
Original Assignee
Casio Computer Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Priority to JP10974780A priority Critical patent/JPS5735408A/en
Publication of JPS5735408A publication Critical patent/JPS5735408A/en
Publication of JPS6337976B2 publication Critical patent/JPS6337976B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/04—Recursive filters
    • H03H17/0461—Quantisation; Rounding; Truncation; Overflow oscillations or limit cycles eliminating measures

Abstract

PURPOSE:To prevent malfunction, by keeping a gain coefficient to a positive value when the gain coefficient controlled with a control means based on the detection of the overflow is 0 or negative. CONSTITUTION:While a signal indicating an overflow from a carry processing circuit 4 is given to a gain control circuir 13, if a gain coefficient (k) is changed to a smaller value with the change in the cut-off frequency fc, a data (k') applied from an adder 14 is positive in a gain coefficient control circuit 2, that is, if the code bit being the most significant bit is zero, AND gates 61-67 are opened and the input data (k') is outputted as a coefficient (k''). If the data (k') is 0 or negative, the output (k'') of the gain coefficient control circuit 2 is set to ''2<-8>''.
JP10974780A 1980-08-09 1980-08-09 Digital filter device Granted JPS5735408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10974780A JPS5735408A (en) 1980-08-09 1980-08-09 Digital filter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10974780A JPS5735408A (en) 1980-08-09 1980-08-09 Digital filter device

Publications (2)

Publication Number Publication Date
JPS5735408A true JPS5735408A (en) 1982-02-26
JPS6337976B2 JPS6337976B2 (en) 1988-07-27

Family

ID=14518218

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10974780A Granted JPS5735408A (en) 1980-08-09 1980-08-09 Digital filter device

Country Status (1)

Country Link
JP (1) JPS5735408A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172428A (en) * 1985-01-28 1986-08-04 Matsushita Electric Ind Co Ltd Digital filter
US4883024A (en) * 1987-01-23 1989-11-28 Kubota Limited Water-cooling system for a water-cooled horizontal cylinder engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172428A (en) * 1985-01-28 1986-08-04 Matsushita Electric Ind Co Ltd Digital filter
JPH0347773B2 (en) * 1985-01-28 1991-07-22 Matsushita Electric Ind Co Ltd
US4883024A (en) * 1987-01-23 1989-11-28 Kubota Limited Water-cooling system for a water-cooled horizontal cylinder engine

Also Published As

Publication number Publication date
JPS6337976B2 (en) 1988-07-27

Similar Documents

Publication Publication Date Title
JPS57117027A (en) Signal sending and receiving circuit
JPS57109089A (en) Initial value resetting circuit for operational amplifier
JPS5735408A (en) Digital filter device
JPS5735407A (en) Digital filter device
JPS5526750A (en) Digital filter
JPS52146655A (en) Data processing and controlling unit of balances, etc.
JPS5721117A (en) Digital filter device
JPS56149823A (en) Band pass filter
JPS5510614A (en) Controller
JPS5679509A (en) Automatic gain control circuit
JPS56120212A (en) Digital filter of block floating decimal point
JPS57114946A (en) Microprogram controller
JPS54138975A (en) Position pulse correcting circuit
JPS5659352A (en) Signal selective circuit
JPS56129443A (en) Adaptive type differential pcm system and its device
JPS57176516A (en) Pcm signal device
JPS56103738A (en) Multiplication and division device for pcm signal
JPS5720014A (en) Digit overflow processor of digital filter
JPS5721116A (en) Digital filter device
JPS5616221A (en) Control system for data transfer
JPS531423A (en) Input control unit for electronic computers
JPS56114441A (en) Counting circuit
JPS5612888A (en) Control device for motor
JPS55127750A (en) Transmission and receiving control circuit
JPS6430400A (en) Acoustic signal processing circuit