GB504966A - Improvements in or relating to circuits for the production of saw-tooth oscillationsof constant frequency and more especially for electrical musical instruments - Google Patents

Improvements in or relating to circuits for the production of saw-tooth oscillationsof constant frequency and more especially for electrical musical instruments

Info

Publication number
GB504966A
GB504966A GB5028/38A GB502838A GB504966A GB 504966 A GB504966 A GB 504966A GB 5028/38 A GB5028/38 A GB 5028/38A GB 502838 A GB502838 A GB 502838A GB 504966 A GB504966 A GB 504966A
Authority
GB
United Kingdom
Prior art keywords
condenser
valve
oscillator
transformer
resistance
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.)
Expired
Application number
GB5028/38A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB504966A publication Critical patent/GB504966A/en
Expired 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
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/86—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements gas-filled tubes or spark-gaps
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H5/00—Instruments in which the tones are generated by means of electronic generators
    • G10H5/10—Instruments in which the tones are generated by means of electronic generators using generation of non-sinusoidal basic tones, e.g. saw-tooth

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

504,966. Valve generating circuits. TRAUTWEIN, F. Feb. 17, 1938, No. 5028. Convention date, Feb. 17, 1937. [Class 40 (v)] A relaxation oscillator is trigged when the condenser is charged to a predetermined voltage by an impulse supplied to the valve from the charging circuit. As shown in the figure, the condenser 12 is charged over resistance 13. When the voltage on the condenser equals that determined by tapping 15 current flows through transformer' 17 and a pulse is passed to valve 11 which allows current to flow. and the condenser to discharge. The valve may be a gas filled or a high vacuum valve and may be a diode or a triode. If a diode is used the secondary of transformer 17 is in the anode circuit of the valve. An amplifier may be placed in the circuit 15, 16. The rectifier 16 may be replaced by a high resistance or by a valve. The transformer 17 is wound to have a low resistance and the core is of finely divided iron and is premagnetized. The oscillator may be provided with filters to remove undesired harmonics and may be used as a synchronizing oscillator for an oscillator having an output of required wave form. The oscillator may be used in a musical instrument. The Specification as open to inspection under Sect. 91 states that transformer 17 may be replaced by a resistance-capacity coupling. A system of frequency division, Fig. 6 (Cancelled), is also described, the condenser 12 being charged over resistance 13 to a value determined by tapping 15 and discharged when the charge on condenser 26 has reached a predetermined value. The condenser 26 is charged by pulses received over rectifier 28 and the number of pulses required to charge 28, which number is the denominator for frequency division, is determined by the value of condenser 26. This subject-matter does not appear in the Specification as accepted.
GB5028/38A 1937-02-17 1938-02-17 Improvements in or relating to circuits for the production of saw-tooth oscillationsof constant frequency and more especially for electrical musical instruments Expired GB504966A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE504966X 1937-02-17

Publications (1)

Publication Number Publication Date
GB504966A true GB504966A (en) 1939-05-03

Family

ID=6546281

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5028/38A Expired GB504966A (en) 1937-02-17 1938-02-17 Improvements in or relating to circuits for the production of saw-tooth oscillationsof constant frequency and more especially for electrical musical instruments

Country Status (2)

Country Link
FR (1) FR833836A (en)
GB (1) GB504966A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE924041C (en) * 1948-11-16 1955-02-24 Lorenz C Ag Circuit arrangement for generating saw tooth-shaped tilting vibrations

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE924041C (en) * 1948-11-16 1955-02-24 Lorenz C Ag Circuit arrangement for generating saw tooth-shaped tilting vibrations

Also Published As

Publication number Publication date
FR833836A (en) 1938-11-02

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