JPS55162601A - Sinusoidal wave generating circuit - Google Patents

Sinusoidal wave generating circuit

Info

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
Application number
JP7033679A
Other languages
Japanese (ja)
Inventor
Masabumi Kurita
Masao Kanekura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7033679A priority Critical patent/JPS55162601A/en
Publication of JPS55162601A publication Critical patent/JPS55162601A/en
Pending legal-status Critical Current

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).
JP7033679A 1979-06-05 1979-06-05 Sinusoidal wave generating circuit Pending JPS55162601A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS545923A (en) * 1977-06-15 1979-01-17 Bayer Ag Phosphoric acid esters

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS545923A (en) * 1977-06-15 1979-01-17 Bayer Ag Phosphoric acid esters

Cited By (2)

* Cited by examiner, † Cited by third party
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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