JPS55162601A - Sinusoidal wave generating circuit - Google Patents
Sinusoidal wave generating circuitInfo
- Publication number
- JPS55162601A JPS55162601A JP7033679A JP7033679A JPS55162601A JP S55162601 A JPS55162601 A JP S55162601A JP 7033679 A JP7033679 A JP 7033679A JP 7033679 A JP7033679 A JP 7033679A JP S55162601 A JPS55162601 A JP S55162601A
- Authority
- JP
- Japan
- Prior art keywords
- cosipi
- shift register
- bit
- sinusoidal wave
- 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
- H03K—PULSE TECHNIQUE
- H03K4/00—Generating pulses having essentially a finite slope or stepped portions
- H03K4/02—Generating pulses having essentially a finite slope or stepped portions having stepped portions, e.g. staircase waveform
- H03K4/026—Generating pulses having essentially a finite slope or stepped portions having stepped portions, e.g. staircase waveform using digital techniques
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To obtain a sinusoidal wave electromotive force with constant output impedance, without addition circuits by operational amplifiers, by using a shift register in which the inverted output of the final bit is fed back to the input of the first bit. CONSTITUTION:1/Ri=(1/R)[Cos(i-1).pi/n-cosipi/n] is constituted with a resistor Ri (where; i=1, 2...pi) and a shift register SR is constituted as a Johnson counter. The ground current I obtained at the output terminal OUT at time (i) is expressed as I=Vh (1/R1+...+1/Ri)+Vl(1/Ri+1+...+1/Rn), since the outputs Q1-Qi of the shift register SR are at high level and Qi+1-Qn are at low level, (where; Vh, Vl respectively express high and low level of the output voltage of each bit of the shift register SR). Thus, I=Vh/R.(1-cosipi/n)+Vl/R.(1+cosipi/n). By applying the The venin's theorem, where the internal resistance is Ro and the power supply voltage is e, 1/Ro=1/R+...+1/Rn=2/R and e=Vh/2.(1-cosipi/n)+Vl/2.(1+ cosipi/n), and taking Vh=+V and Vl=-V, then e=-Vcosipi/n. With this constitution, without addition circuits by operational amplifiers, the number of steps of the shift register SR can be made as (n).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7033679A JPS55162601A (en) | 1979-06-05 | 1979-06-05 | Sinusoidal wave generating circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7033679A JPS55162601A (en) | 1979-06-05 | 1979-06-05 | Sinusoidal wave generating circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55162601A true JPS55162601A (en) | 1980-12-18 |
Family
ID=13428466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7033679A Pending JPS55162601A (en) | 1979-06-05 | 1979-06-05 | Sinusoidal wave generating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55162601A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6248803A (en) * | 1985-08-09 | 1987-03-03 | プレツシ− オ−バ−シ−ズ リミテツド | Signal generator |
GB2469629A (en) * | 2009-04-20 | 2010-10-27 | Iti Scotland Ltd | Synthesising a local oscillator waveform |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS545923A (en) * | 1977-06-15 | 1979-01-17 | Bayer Ag | Phosphoric acid esters |
-
1979
- 1979-06-05 JP JP7033679A patent/JPS55162601A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS545923A (en) * | 1977-06-15 | 1979-01-17 | Bayer Ag | Phosphoric acid esters |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6248803A (en) * | 1985-08-09 | 1987-03-03 | プレツシ− オ−バ−シ−ズ リミテツド | Signal generator |
GB2469629A (en) * | 2009-04-20 | 2010-10-27 | Iti Scotland Ltd | Synthesising a local oscillator waveform |
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