JPS6468082A - Sound reproduction circuit - Google Patents
Sound reproduction circuitInfo
- Publication number
- JPS6468082A JPS6468082A JP62223882A JP22388287A JPS6468082A JP S6468082 A JPS6468082 A JP S6468082A JP 62223882 A JP62223882 A JP 62223882A JP 22388287 A JP22388287 A JP 22388287A JP S6468082 A JPS6468082 A JP S6468082A
- Authority
- JP
- Japan
- Prior art keywords
- detection
- variation
- signal
- amplitude
- signals
- 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
Landscapes
- Television Signal Processing For Recording (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
PURPOSE:To obtain a demodulated signal that includes no amplitude-variation that may occur because of phase variation or at the time of reproduction by detecting the frequencies of output signals from respective band-pass filters with a prescribed time constant based on a signal synchronized with the changing of heads and a detection signal from a dropout detection circuit. CONSTITUTION:Reproduced RF signals in respective channels separated in frequency bands after the band-pass filters 15a, 15b are detected by frequency detection circuits 16a, 16b with a prescribed time constant. This detection is executed based on a signal synchronized with the switching between the heads 2a, 2b and a detection signal from the dropout detection circuit 19, and oscillators 17a, 17b operates depending on thus obtained detection outputs. From the oscillators 17a, 17b, modulated signals that do not include phase variation due to switching or amplitude variation at the time of reproduction are outputted. Therefore, in output signals from demodulators 18a, 18b, pulse-like noises or noises due to amplitude variation do not exist, and can be outputted without any particular processing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62223882A JPS6468082A (en) | 1987-09-09 | 1987-09-09 | Sound reproduction circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62223882A JPS6468082A (en) | 1987-09-09 | 1987-09-09 | Sound reproduction circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6468082A true JPS6468082A (en) | 1989-03-14 |
Family
ID=16805186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62223882A Pending JPS6468082A (en) | 1987-09-09 | 1987-09-09 | Sound reproduction circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6468082A (en) |
-
1987
- 1987-09-09 JP JP62223882A patent/JPS6468082A/en active Pending
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