JPS5447562A - Noise eliminating circuit - Google Patents
Noise eliminating circuitInfo
- Publication number
- JPS5447562A JPS5447562A JP11401377A JP11401377A JPS5447562A JP S5447562 A JPS5447562 A JP S5447562A JP 11401377 A JP11401377 A JP 11401377A JP 11401377 A JP11401377 A JP 11401377A JP S5447562 A JPS5447562 A JP S5447562A
- Authority
- JP
- Japan
- Prior art keywords
- noise
- signal
- analog
- output signal
- supplied
- 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
Landscapes
- Analogue/Digital Conversion (AREA)
- Noise Elimination (AREA)
Abstract
PURPOSE: To eliminate the noise generating the signal featuring the same amplitude and phase to the noise of the clock signal of the analog/digital system from the same clock signal and then applying the signal to the output signal of the system with the polarity inversed.
CONSTITUTION: System clock signal (a) led out from analog/digital system 1 is supplied to generate output signal (c) of the same shape as the noise waveform after delay 3 for a fixed period and differentiation 4. Signal (c) is coincided with the noise level via adjusters 5 and then supplied to the negative and positive input terminals of operational amplifier 6 along with analog signal (b) which is sent from system 1 and contains the noise. For amplifier 6, the output signal of adjuster 5 is supplied with an opposite polarity to the noise contained in the analog signal, and then the noise is offset to obtain analog output signal (d) free from the noise. In this way, the low-level noise mixed into the analog signal can be eliminated through a simple circuit
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11401377A JPS5447562A (en) | 1977-09-22 | 1977-09-22 | Noise eliminating circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11401377A JPS5447562A (en) | 1977-09-22 | 1977-09-22 | Noise eliminating circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5447562A true JPS5447562A (en) | 1979-04-14 |
Family
ID=14626858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11401377A Pending JPS5447562A (en) | 1977-09-22 | 1977-09-22 | Noise eliminating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5447562A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5618646U (en) * | 1979-07-23 | 1981-02-18 | ||
JPS5625834A (en) * | 1979-08-09 | 1981-03-12 | Sony Corp | Fm receiver |
JPS58125947A (en) * | 1982-01-21 | 1983-07-27 | Matsushita Electric Ind Co Ltd | Interphone device |
JPS60203020A (en) * | 1984-03-27 | 1985-10-14 | Toko Inc | Noise eliminatng method of analog-to-digital converter |
JPS6226949U (en) * | 1985-07-31 | 1987-02-18 |
-
1977
- 1977-09-22 JP JP11401377A patent/JPS5447562A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5618646U (en) * | 1979-07-23 | 1981-02-18 | ||
JPS6217960Y2 (en) * | 1979-07-23 | 1987-05-08 | ||
JPS5625834A (en) * | 1979-08-09 | 1981-03-12 | Sony Corp | Fm receiver |
JPS6257131B2 (en) * | 1979-08-09 | 1987-11-30 | Sony Corp | |
JPS58125947A (en) * | 1982-01-21 | 1983-07-27 | Matsushita Electric Ind Co Ltd | Interphone device |
JPS60203020A (en) * | 1984-03-27 | 1985-10-14 | Toko Inc | Noise eliminatng method of analog-to-digital converter |
JPS6226949U (en) * | 1985-07-31 | 1987-02-18 |
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