JPS5510210A - Signal discrimination circuit - Google Patents
Signal discrimination circuitInfo
- Publication number
- JPS5510210A JPS5510210A JP8191378A JP8191378A JPS5510210A JP S5510210 A JPS5510210 A JP S5510210A JP 8191378 A JP8191378 A JP 8191378A JP 8191378 A JP8191378 A JP 8191378A JP S5510210 A JPS5510210 A JP S5510210A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- multiplication
- signal
- discrimination
- discrimination circuit
- 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.)
- Granted
Links
Landscapes
- Television Receiver Circuits (AREA)
- Selective Calling Equipment (AREA)
Abstract
PURPOSE: To allow the multiplier circuit of a PLL circuit to discriminate easily and definitely a signal between two modulated waves of adjacent signal frequencies.
CONSTITUTION: The 1st and 2nd signal frequencies are denoted by (f1) and (f2) respectively, and the carrier frequency is by (f0). A signal inputted to input terminal 1 is demodulated 3 to obtain signals of (f1) and (f2). The demodulated signals are inputted to frequency multiplication-by-N circuit 4 with multiplier N which is an integer satisfying the relation of f1<f0/N<f2. The outputs of the multiplication- by-N circuit are N.f1 and Nf2, which are discriminated by a comparison with (f0) by the frequency comparing discrimination circuit. To ensure this discrimination, PLL is used for multiplication-by-N circuit 4 and a phase discriminator for discrimination circuit 6.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53081913A JPS5853821B2 (en) | 1978-07-07 | 1978-07-07 | signal identification circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53081913A JPS5853821B2 (en) | 1978-07-07 | 1978-07-07 | signal identification circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5510210A true JPS5510210A (en) | 1980-01-24 |
JPS5853821B2 JPS5853821B2 (en) | 1983-12-01 |
Family
ID=13759677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53081913A Expired JPS5853821B2 (en) | 1978-07-07 | 1978-07-07 | signal identification circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5853821B2 (en) |
-
1978
- 1978-07-07 JP JP53081913A patent/JPS5853821B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5853821B2 (en) | 1983-12-01 |
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