JPS5720014A - Digit overflow processor of digital filter - Google Patents

Digit overflow processor of digital filter

Info

Publication number
JPS5720014A
JPS5720014A JP9446580A JP9446580A JPS5720014A JP S5720014 A JPS5720014 A JP S5720014A JP 9446580 A JP9446580 A JP 9446580A JP 9446580 A JP9446580 A JP 9446580A JP S5720014 A JPS5720014 A JP S5720014A
Authority
JP
Japan
Prior art keywords
circuit
overflow
input data
value
digital filter
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
JP9446580A
Other languages
Japanese (ja)
Other versions
JPS6337978B2 (en
Inventor
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 JP9446580A priority Critical patent/JPS5720014A/en
Publication of JPS5720014A publication Critical patent/JPS5720014A/en
Publication of JPS6337978B2 publication Critical patent/JPS6337978B2/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 oscillating operation due to an overflow by performing overflow processing by outputting the maximum value of a dynamic range when input data is positive or the minimum value when negative. CONSTITUTION:According to the value of the output data of an adder 2 which adds the outputs of an adder 8 and a multiplier 1, a digit overflow circuit 12 controls the output data. When the absolute value of input data to the circuit 12 is >1, the input data is outputted as it is. When the absolute value of the input data to the circuit 12 is >=1 and <2, the circuit 12 outputs the maximum value of a dynamic range in response to the positive input or the minimum value in response to the negative one. Therefore, the circuit 12 prevents an overflow to prevent oscillations of a filter.
JP9446580A 1980-07-09 1980-07-09 Digit overflow processor of digital filter Granted JPS5720014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9446580A JPS5720014A (en) 1980-07-09 1980-07-09 Digit overflow processor of digital filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9446580A JPS5720014A (en) 1980-07-09 1980-07-09 Digit overflow processor of digital filter

Publications (2)

Publication Number Publication Date
JPS5720014A true JPS5720014A (en) 1982-02-02
JPS6337978B2 JPS6337978B2 (en) 1988-07-27

Family

ID=14111020

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9446580A Granted JPS5720014A (en) 1980-07-09 1980-07-09 Digit overflow processor of digital filter

Country Status (1)

Country Link
JP (1) JPS5720014A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6993545B2 (en) 2000-09-27 2006-01-31 Kabushiki Kaisha Toshiba Digital filter with protection against overflow oscillation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON CIRCUIT THEORY=1971 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6993545B2 (en) 2000-09-27 2006-01-31 Kabushiki Kaisha Toshiba Digital filter with protection against overflow oscillation

Also Published As

Publication number Publication date
JPS6337978B2 (en) 1988-07-27

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