GB1214146A - Improvements in or relating to frequency doubler and coupler for electronic music generation systems - Google Patents
Improvements in or relating to frequency doubler and coupler for electronic music generation systemsInfo
- Publication number
- GB1214146A GB1214146A GB5512467A GB5512467A GB1214146A GB 1214146 A GB1214146 A GB 1214146A GB 5512467 A GB5512467 A GB 5512467A GB 5512467 A GB5512467 A GB 5512467A GB 1214146 A GB1214146 A GB 1214146A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- sawtooth
- wave
- inverter
- adder
- 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
Links
Classifications
-
- 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
- G10H5/02—Instruments in which the tones are generated by means of electronic generators using generation of basic tones
- G10H5/06—Instruments in which the tones are generated by means of electronic generators using generation of basic tones tones generated by frequency multiplication or division of a basic tone
- G10H5/07—Instruments in which the tones are generated by means of electronic generators using generation of basic tones tones generated by frequency multiplication or division of a basic tone resulting in complex waveforms
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K6/00—Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
1,214,146. Electronic music generator. CHICAGO MUSICAL INSTRUMENT CO. 4 Dec., 1967, No. 55124/67. Heading G5J. [Also in Division H3] In an electronic music generation system, a square wave of frequency f from a source 11, is inverted at 12, and combined in an adder 13, with a sawtooth wave of equal frequency from a synchronized source 10, to give a sawtooth output wave of frequency 2f. In a frequency doubler embodiment (Fig. 3, not shown) equal frequency square waves (11<SP>1</SP>) and sawtooth waves (10<SP>1</SP>) drive tone colour filters (24, 26, respectively) and in addition the square wave is inverted in a unity gain transistorized inverter (12), its peak amplitude halved in an adder (13) and combined with the sawtooth wave (10<SP>1</SP>) to give a sawtooth output wave of frequency 2f, driving a tone colour filter (25). In an octave coupler embodiment (Fig. 4, not shown), the adder (13) includes a switch (43) to open circuit the inverter, and resistors (28, 30) selected to give a mixture of sawtooth waveforms (13<SP>1</SP>, frequency 2f, 10<SP>1</SP>, frequency f). The gain of the inverter circuit (12a, Fig. 5, not shown) may be controlled by a complex signal at an input (51) and the variable gain inverter connected to the square wave source (Fig. 6, not shown) or a variable control comprising a variable voltage controlled amplifier (74, Fig. 7, not shown) may be coupled to the sawtooth generator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5512467A GB1214146A (en) | 1967-12-04 | 1967-12-04 | Improvements in or relating to frequency doubler and coupler for electronic music generation systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5512467A GB1214146A (en) | 1967-12-04 | 1967-12-04 | Improvements in or relating to frequency doubler and coupler for electronic music generation systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1214146A true GB1214146A (en) | 1970-12-02 |
Family
ID=10473029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5512467A Expired GB1214146A (en) | 1967-12-04 | 1967-12-04 | Improvements in or relating to frequency doubler and coupler for electronic music generation systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1214146A (en) |
-
1967
- 1967-12-04 GB GB5512467A patent/GB1214146A/en not_active Expired
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |