JPS54134962A - Generating circuit for dual-frequency signal - Google Patents
Generating circuit for dual-frequency signalInfo
- Publication number
- JPS54134962A JPS54134962A JP4359378A JP4359378A JPS54134962A JP S54134962 A JPS54134962 A JP S54134962A JP 4359378 A JP4359378 A JP 4359378A JP 4359378 A JP4359378 A JP 4359378A JP S54134962 A JPS54134962 A JP S54134962A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- taps
- resistor
- dual
- frequency signal
- 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
Abstract
PURPOSE: To obtain a dual-frequency signal generating circuit of the miniaturized circuit constitution with its temperature dependency made small, by providing a common D/A converter.
CONSTITUTION: As for the resistance network constituting the D/A converter, taps whose number is equivalent to a ratio between a voltage needed as the maximum voltage and the minimum decomposed voltage are led out on both the side of a resistor at uniform intervals from the middle point of the resistor, and a voltage covering a range from the maximum voltage to the minimum voltage of a sine wave is divided uniformly on the time axis to select taps equivalent to respective division points from those taps; and the drain of the metal oxide film semiconductor switch (MOS switch) is connected to the taps and its source is connected to one side of the resistor in common, thereby obtaining output terminals 17 and 18. To the gate of the MOS switch, clock signals 15 and 16 are applied by way of gate selector circuits 10 and 11 and independent desirable output sine waves can be obtained from output terminals 17 and 18.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4359378A JPS54134962A (en) | 1978-04-12 | 1978-04-12 | Generating circuit for dual-frequency signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4359378A JPS54134962A (en) | 1978-04-12 | 1978-04-12 | Generating circuit for dual-frequency signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54134962A true JPS54134962A (en) | 1979-10-19 |
Family
ID=12668087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4359378A Pending JPS54134962A (en) | 1978-04-12 | 1978-04-12 | Generating circuit for dual-frequency signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54134962A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0720745U (en) * | 1994-06-09 | 1995-04-11 | 財団法人工業技術研究院 | Dual Tone Multi Frequency Generator |
-
1978
- 1978-04-12 JP JP4359378A patent/JPS54134962A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0720745U (en) * | 1994-06-09 | 1995-04-11 | 財団法人工業技術研究院 | Dual Tone Multi Frequency Generator |
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