SE8105853L - DEVICE FOR DIGITALIZATION OF ANALOGUE SIGNAL - Google Patents
DEVICE FOR DIGITALIZATION OF ANALOGUE SIGNALInfo
- Publication number
- SE8105853L SE8105853L SE8105853A SE8105853A SE8105853L SE 8105853 L SE8105853 L SE 8105853L SE 8105853 A SE8105853 A SE 8105853A SE 8105853 A SE8105853 A SE 8105853A SE 8105853 L SE8105853 L SE 8105853L
- Authority
- SE
- Sweden
- Prior art keywords
- delta
- signal
- modulator
- output
- pulses
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M3/00—Conversion of analogue values to or from differential modulation
- H03M3/02—Delta modulation, i.e. one-bit differential modulation
Abstract
A device for digitizing an analog signal whose mean value is constant, comprising a delta modulator (3) which is arranged to sample the signal during successive time intervals, each of which has a duration which corresponds to n pulses of a clock pulse generator (11), and to supply m (m < n) pulses per time interval DELTA T, m being dependent on the difference between the values of the signal at the beginning (T) and at the end (T + DELTA T) of the interval. The clocked output of the delta modulator (3) is applied together with the clock pulses to a bidirectional counter (5) arranged to count in one direction or the other in response to the corresponding presence or absence of a modulator output pulse during a clock pulse, and the running total count is applied as a digital input value to a correction circuit (7) which is constructed as a digital high-pass filter (Figure 3) in order to remove error signals which are added to the signal due to inaccuracies of the delta modulator, by forming the progressive mean value S(T) of the counter output signal and subtracting this from the counter output S(T + DELTA T). <IMAGE>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8005549A NL8005549A (en) | 1980-10-08 | 1980-10-08 | DEVICE FOR DIGITALIZING AN ANALOGUE SIGNAL. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE8105853L true SE8105853L (en) | 1982-04-09 |
| SE451523B SE451523B (en) | 1987-10-12 |
Family
ID=19835989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8105853A SE451523B (en) | 1980-10-08 | 1981-10-05 | DEVICE FOR DIGITALIZATION OF ANALOGUE SIGNAL, AND APPLICATION OF THESE DEVICE FOR AN ELECTROCARDIOGRAPHY DEVICE |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5795722A (en) |
| CA (1) | CA1182923A (en) |
| DE (1) | DE3139800C2 (en) |
| FR (1) | FR2491700A1 (en) |
| GB (1) | GB2085683B (en) |
| IT (1) | IT1194099B (en) |
| NL (1) | NL8005549A (en) |
| SE (1) | SE451523B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63196696U (en) * | 1987-06-04 | 1988-12-19 | ||
| DE3825884A1 (en) * | 1988-07-29 | 1990-02-01 | Texas Instruments Deutschland | Method for increasing the resolution of an A/D converter |
| US7312785B2 (en) | 2001-10-22 | 2007-12-25 | Apple Inc. | Method and apparatus for accelerated scrolling |
| US7333092B2 (en) | 2002-02-25 | 2008-02-19 | Apple Computer, Inc. | Touch pad for handheld device |
| US8022935B2 (en) | 2006-07-06 | 2011-09-20 | Apple Inc. | Capacitance sensing electrode with integrated I/O mechanism |
| US8274479B2 (en) | 2006-10-11 | 2012-09-25 | Apple Inc. | Gimballed scroll wheel |
| US9654104B2 (en) | 2007-07-17 | 2017-05-16 | Apple Inc. | Resistive force sensor with capacitive discrimination |
| US8683378B2 (en) | 2007-09-04 | 2014-03-25 | Apple Inc. | Scrolling techniques for user interfaces |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52114346A (en) * | 1976-03-23 | 1977-09-26 | Nippon Chemical Ind | Indicating device for ad converter |
-
1980
- 1980-10-08 NL NL8005549A patent/NL8005549A/en not_active Application Discontinuation
-
1981
- 1981-10-01 CA CA000387123A patent/CA1182923A/en not_active Expired
- 1981-10-02 FR FR8118605A patent/FR2491700A1/en active Granted
- 1981-10-05 SE SE8105853A patent/SE451523B/en not_active IP Right Cessation
- 1981-10-05 IT IT24334/81A patent/IT1194099B/en active
- 1981-10-05 GB GB8130002A patent/GB2085683B/en not_active Expired
- 1981-10-07 DE DE3139800A patent/DE3139800C2/en not_active Expired
- 1981-10-08 JP JP56159574A patent/JPS5795722A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2491700A1 (en) | 1982-04-09 |
| IT8124334A0 (en) | 1981-10-05 |
| FR2491700B1 (en) | 1985-03-08 |
| JPS6218095B2 (en) | 1987-04-21 |
| GB2085683B (en) | 1984-08-08 |
| CA1182923A (en) | 1985-02-19 |
| GB2085683A (en) | 1982-04-28 |
| SE451523B (en) | 1987-10-12 |
| NL8005549A (en) | 1982-05-03 |
| DE3139800C2 (en) | 1985-09-12 |
| JPS5795722A (en) | 1982-06-14 |
| IT1194099B (en) | 1988-09-14 |
| DE3139800A1 (en) | 1982-06-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |
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