JPS57171807A - Multifrequency generating circuit - Google Patents
Multifrequency generating circuitInfo
- Publication number
- JPS57171807A JPS57171807A JP5748881A JP5748881A JPS57171807A JP S57171807 A JPS57171807 A JP S57171807A JP 5748881 A JP5748881 A JP 5748881A JP 5748881 A JP5748881 A JP 5748881A JP S57171807 A JPS57171807 A JP S57171807A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- frequencies
- output
- sampling
- 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
Abstract
PURPOSE: To output signals having necessary frequencies at the same time and in quantities stably by storing PCM data obtained by sampling sine waves having different frequencies at the same sampling timing, and succesively reading them synchronously with clock pulses.
CONSTITUTION: An address generating circuit 10 is connected to an input terminal 9, and a latch specifying circuit 11 and an encoded-sine-wave storage circuit 12 are connected to the circuit 10 respectively. Latch circuits 131∼13n are connected to the circuit 12, and the output of the circuit 11 is led to the circuits 131∼13n. Digital outputs are DA-converted at parts 141∼14n, whose outputs are led to output terminals 161∼16n through LPFs 151∼15n. In the circuit 12, PCM data obtained by sampling sine waves having frequencies f1∼fn at the same timing are stored respectively. In this constitution, the output signal of a main oscillator is supplied to the terminal 9 to output waveform-shaped signals having frequencies f1∼fn at the same time.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5748881A JPS57171807A (en) | 1981-04-15 | 1981-04-15 | Multifrequency generating circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5748881A JPS57171807A (en) | 1981-04-15 | 1981-04-15 | Multifrequency generating circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57171807A true JPS57171807A (en) | 1982-10-22 |
Family
ID=13057097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5748881A Pending JPS57171807A (en) | 1981-04-15 | 1981-04-15 | Multifrequency generating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57171807A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5590128A (en) * | 1978-12-27 | 1980-07-08 | Hitachi Ltd | Variable phase signal generator |
-
1981
- 1981-04-15 JP JP5748881A patent/JPS57171807A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5590128A (en) * | 1978-12-27 | 1980-07-08 | Hitachi Ltd | Variable phase signal generator |
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