JPS54116130A - Signal processing circuit - Google Patents
Signal processing circuitInfo
- Publication number
- JPS54116130A JPS54116130A JP2300378A JP2300378A JPS54116130A JP S54116130 A JPS54116130 A JP S54116130A JP 2300378 A JP2300378 A JP 2300378A JP 2300378 A JP2300378 A JP 2300378A JP S54116130 A JPS54116130 A JP S54116130A
- Authority
- JP
- Japan
- Prior art keywords
- attenuation
- signal
- dispersion
- phase
- 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.)
- Pending
Links
Landscapes
- Processing Of Color Television Signals (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
PURPOSE: To reduce the number of pins and to enable to connect in multi-stages, by forming and constituting AC coupling circuits so that the attenuation and phase rotation of circuit can not be given effect to the signal processed through the use of the capacitors constituted into IC.
CONSTITUTION: Taking the delivery performance (attenuation) of the AC coupling circuits P1 and P2 as P1 and P2. The input signal e5 to the burst phase detection circuit A5 at greater signal e1 is independently of the attenuation P2 and constant regerdless of the dispersion in P2. Further, the input signal e4 of the demodulation circuit A4 is determined with the ratio of attenuation P1 and P2. In case of IC, the ratio of capacitances can be made with a good accuracy and the constituent element of P1 and P2 has disperision toward the trend in the same direction, then e4 is not almost affected by P1 and P2 either. Further, the phase θp1 and θp2 between the input and output of the circuits P1 and P2 have the same dispersion, resulting is very small dispersion for θP1-θP2. That is, no dispersion of the phase difference between the burst signal and the chroma signal is caused. Accordingly, even if the capacitor in the AC coupling circuits has an impedance and causes attenuation or phase rotation, no effect on the overall circuit performance is made.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2300378A JPS54116130A (en) | 1978-03-01 | 1978-03-01 | Signal processing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2300378A JPS54116130A (en) | 1978-03-01 | 1978-03-01 | Signal processing circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54116130A true JPS54116130A (en) | 1979-09-10 |
Family
ID=12098316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2300378A Pending JPS54116130A (en) | 1978-03-01 | 1978-03-01 | Signal processing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54116130A (en) |
-
1978
- 1978-03-01 JP JP2300378A patent/JPS54116130A/en active Pending
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