JPS641335A - Transmitter with noise preventing circuit - Google Patents
Transmitter with noise preventing circuitInfo
- Publication number
- JPS641335A JPS641335A JP15550487A JP15550487A JPS641335A JP S641335 A JPS641335 A JP S641335A JP 15550487 A JP15550487 A JP 15550487A JP 15550487 A JP15550487 A JP 15550487A JP S641335 A JPS641335 A JP S641335A
- Authority
- JP
- Japan
- Prior art keywords
- apc
- circuit
- voltage
- logic signal
- delay 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
- Transmitters (AREA)
Abstract
PURPOSE: To prevent occurrence of noises when a power source is actuated, by starting transmission after occurrence of noises from a digital phase comparator is terminated when the power source is actuated.
CONSTITUTION: Since the control voltage of an automatic phase controlling circuit (APC) becomes abnormal for a fixed time after the power supply is turned on, an APC voltage discriminating circuit 1 sends a logic signal of '0' to a delay circuit 2. Upon inputting the logic signal of '0', the delay circuit 2 immediately controls a switch 3 to open. When the APC controlling voltage becomes a normal value, the APC voltage discriminating circuit 1 generates a logic signal of '1' and the delay circuit 2 controls the switch 3 to turn on after a delay time which is required for locking the transmitting output frequency elapses. Therefore, even when the oscillation frequency of a voltage controlled oscillator (VCO) rises from a point far from the center, the transmitter generating no noise is obtained.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15550487A JPS641335A (en) | 1987-06-24 | 1987-06-24 | Transmitter with noise preventing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15550487A JPS641335A (en) | 1987-06-24 | 1987-06-24 | Transmitter with noise preventing circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH011335A JPH011335A (en) | 1989-01-05 |
| JPS641335A true JPS641335A (en) | 1989-01-05 |
Family
ID=15607490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15550487A Pending JPS641335A (en) | 1987-06-24 | 1987-06-24 | Transmitter with noise preventing circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS641335A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1246375A2 (en) * | 2001-03-28 | 2002-10-02 | Nec Corporation | Satellite communication transmission control system and small aperture terminal |
| US8278379B2 (en) | 2000-03-02 | 2012-10-02 | Sekisui Chemical Co., Ltd. | Interlayer film for laminated glass and laminated glass |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2006025300A1 (en) * | 2004-08-30 | 2008-05-08 | 株式会社ジェイ・エム・エス | Coronary artery bypass surgery aid |
-
1987
- 1987-06-24 JP JP15550487A patent/JPS641335A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8278379B2 (en) | 2000-03-02 | 2012-10-02 | Sekisui Chemical Co., Ltd. | Interlayer film for laminated glass and laminated glass |
| US8450405B2 (en) | 2000-03-02 | 2013-05-28 | Sekisui Chemical Co., Ltd. | Interlayer film for laminated glass and laminated glass |
| EP1246375A2 (en) * | 2001-03-28 | 2002-10-02 | Nec Corporation | Satellite communication transmission control system and small aperture terminal |
| EP1246375A3 (en) * | 2001-03-28 | 2005-10-26 | Nec Corporation | Satellite communication transmission control system and small aperture terminal |
| US6968162B2 (en) | 2001-03-28 | 2005-11-22 | Nec Corporation | Satellite communication transmission control system and small aperture terminal |
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