JPS54127208A - Transmitter-receiver - Google Patents
Transmitter-receiverInfo
- Publication number
- JPS54127208A JPS54127208A JP3415578A JP3415578A JPS54127208A JP S54127208 A JPS54127208 A JP S54127208A JP 3415578 A JP3415578 A JP 3415578A JP 3415578 A JP3415578 A JP 3415578A JP S54127208 A JPS54127208 A JP S54127208A
- Authority
- JP
- Japan
- Prior art keywords
- switch
- pass filter
- frequency
- transmitter
- constitution
- 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
- Transmitters (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
PURPOSE: To simplify the constitution of a transmitter-receiver by using a switch for both inputting and outputting with the number of connection cables reduced.
CONSTITUTION: Since the intermediate frequency of an oridinary transmitter is equal to a frequency obtained by dividing an output frequency by an integer, low- pass filters 7a to 7c and high-pass filter 8 can be easily constituted by strip lines and miniaturized. Next, intermediate frequency fIF inputted to an input terminal is supplied to switch 3 via low-pass filter 7c. With switch 3 turned to the band- pass filter 5a side, the intermediate frequancy is applied to frequency converter 4a via low-pass filter 7a. The output frequency mixed with the oscillation frequency of local oscillator 6a is passed through switch 3 in an ON state and high-pass filter 8 and then outputted to terminal 2. Consequently, only one switch is required and the circuit constitution is simplified.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3415578A JPS54127208A (en) | 1978-03-27 | 1978-03-27 | Transmitter-receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3415578A JPS54127208A (en) | 1978-03-27 | 1978-03-27 | Transmitter-receiver |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54127208A true JPS54127208A (en) | 1979-10-03 |
JPS5722489B2 JPS5722489B2 (en) | 1982-05-13 |
Family
ID=12406306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3415578A Granted JPS54127208A (en) | 1978-03-27 | 1978-03-27 | Transmitter-receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54127208A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0336473Y2 (en) * | 1986-06-30 | 1991-08-01 |
-
1978
- 1978-03-27 JP JP3415578A patent/JPS54127208A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5722489B2 (en) | 1982-05-13 |
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