JPS55150619A - Nonlinear coder - Google Patents
Nonlinear coderInfo
- Publication number
- JPS55150619A JPS55150619A JP5761279A JP5761279A JPS55150619A JP S55150619 A JPS55150619 A JP S55150619A JP 5761279 A JP5761279 A JP 5761279A JP 5761279 A JP5761279 A JP 5761279A JP S55150619 A JPS55150619 A JP S55150619A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- nonlinear
- amplifier
- converter
- constitution
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/18—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To simplify constitution by coding an input analogue signal in a linear A/D converter after amplifying this signal is a variable gain amplifier and by making the signal nonlinear in the stage of the variable gain amplifier. CONSTITUTION:It is supposed that the value obtained by amplifying input analogue signal Ain with a minimum gain by variable gain amplifier 41 and converting this signal to a three-bit digital signal by A/D converter 42 is (011). Control gate circuit 43 where this digital signal is input indicates to amplifier 41 that this signal belongs to prescribed (10) out of nonlinear classifications, and stores (10) in upper bit stage 44-1 of register 44. Amplifier 41 is set to a gain so that signal Ain of the (10) level may be magnified up to the maximum dynamic range of converter 42, and this signal is held in a sample hole circuit and so on and is digitized with a current level scale and is stored in lower bit stage 44-2 of register 44 as it is and is coded to a nonlinear code. Thus, constitution can be simplified.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5761279A JPS55150619A (en) | 1979-05-12 | 1979-05-12 | Nonlinear coder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5761279A JPS55150619A (en) | 1979-05-12 | 1979-05-12 | Nonlinear coder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55150619A true JPS55150619A (en) | 1980-11-22 |
Family
ID=13060679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5761279A Pending JPS55150619A (en) | 1979-05-12 | 1979-05-12 | Nonlinear coder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55150619A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62178017A (en) * | 1986-01-31 | 1987-08-05 | Sony Corp | Gain control circuit |
WO2006055014A1 (en) * | 2004-11-01 | 2006-05-26 | Medtronic, Inc. | Data compression method for implantable medical devices |
-
1979
- 1979-05-12 JP JP5761279A patent/JPS55150619A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62178017A (en) * | 1986-01-31 | 1987-08-05 | Sony Corp | Gain control circuit |
WO2006055014A1 (en) * | 2004-11-01 | 2006-05-26 | Medtronic, Inc. | Data compression method for implantable medical devices |
US7288066B2 (en) | 2004-11-01 | 2007-10-30 | Medtronic, Inc. | Data compression method for implantable medical devices |
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