JPS5513572A - Gate circuit - Google Patents
Gate circuitInfo
- Publication number
- JPS5513572A JPS5513572A JP8633578A JP8633578A JPS5513572A JP S5513572 A JPS5513572 A JP S5513572A JP 8633578 A JP8633578 A JP 8633578A JP 8633578 A JP8633578 A JP 8633578A JP S5513572 A JPS5513572 A JP S5513572A
- Authority
- JP
- Japan
- Prior art keywords
- trq11
- gate
- base
- trq10
- trq12
- 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
- 239000003990 capacitor Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
- H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking
Landscapes
- Electronic Switches (AREA)
- Noise Elimination (AREA)
Abstract
PURPOSE:To improve a pulse-property noise removal characteristic by setting the holding voltage level of a gate circuit having a limiter function so that signals at a noise removal time may be fixed and the operation range may be wider and the frequency characteristic may be improved. CONSTITUTION:In respect to transistors TrQ11 and Q12 which constitute the limiter circuit of a pulse-property noise removal circuit having input terminal 8 and output terminal 13, the base of TrQ11 is connected to the collector of TrQ10, and the base of TrQ11 is connected to the base of TrQ12, and TrQ12 is driven by constant current I4. Then, the base of TrQ12 is connected to the emitter of TrQ14 out of TrQ6, Q5, Q13, and Q14 which constitute a buffer amplifier; and in case that a noise having a potential higher than the emitter potential of gate TrQ10 during the turning-off state of gate TrQ11 is inputted, the turning-off state of gate TrQ10 is continued by TrQ16 and capacitor C2, thereby extending the dynamic range and the frequency characteristic.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8633578A JPS5944817B2 (en) | 1978-07-14 | 1978-07-14 | gate circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8633578A JPS5944817B2 (en) | 1978-07-14 | 1978-07-14 | gate circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5513572A true JPS5513572A (en) | 1980-01-30 |
JPS5944817B2 JPS5944817B2 (en) | 1984-11-01 |
Family
ID=13883965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8633578A Expired JPS5944817B2 (en) | 1978-07-14 | 1978-07-14 | gate circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5944817B2 (en) |
-
1978
- 1978-07-14 JP JP8633578A patent/JPS5944817B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5944817B2 (en) | 1984-11-01 |
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