JPS5558813A - Input circuit for selection signal - Google Patents
Input circuit for selection signalInfo
- Publication number
- JPS5558813A JPS5558813A JP13052878A JP13052878A JPS5558813A JP S5558813 A JPS5558813 A JP S5558813A JP 13052878 A JP13052878 A JP 13052878A JP 13052878 A JP13052878 A JP 13052878A JP S5558813 A JPS5558813 A JP S5558813A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- mode
- current
- selection signal
- integrated 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.)
- Granted
Links
Landscapes
- Television Signal Processing For Recording (AREA)
Abstract
PURPOSE: To decrease the number of terminal leaders of the integrated circuit, by commonly using the two functions of the control of circuit current and mode selection in the integrated circuit with one terminal leader.
CONSTITUTION: When the switch 10 is at the mode 1, the current source circuit 18 is inoperative because of no current I1, and the circuits 13 and 14 are not operated since the currents I2 and I3 flow. Further, the selection signal LOW is delivered through the resistor 19 to the selection circuit 20 of the circuit 15 to conduct the input and output system of the mode 1. When the switch 10 is at the mode 2, the current source circuit 18 is operated and the currents I2 and I3 in proportion to the current I1 flowing to the resistor 11 flow to the circuits 13 and 14. That is, the currents I2 and I3 are controlled with the resistor 11. Further, the High potential of the selection signal of the circuit 15 is delivered to conduct the output path of the mode 2. Thus, the two functions of the control of circuit current in the integrated circuit and the mode selection are given to one drawing-out terminal, allowing to decrease the number of drawing-out terminals of the integrated circuit.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13052878A JPS5558813A (en) | 1978-10-25 | 1978-10-25 | Input circuit for selection signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13052878A JPS5558813A (en) | 1978-10-25 | 1978-10-25 | Input circuit for selection signal |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5558813A true JPS5558813A (en) | 1980-05-01 |
JPS6248954B2 JPS6248954B2 (en) | 1987-10-16 |
Family
ID=15036447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13052878A Granted JPS5558813A (en) | 1978-10-25 | 1978-10-25 | Input circuit for selection signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5558813A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5273624A (en) * | 1975-12-16 | 1977-06-20 | Mitsubishi Electric Corp | Electric signal processing circuit |
-
1978
- 1978-10-25 JP JP13052878A patent/JPS5558813A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5273624A (en) * | 1975-12-16 | 1977-06-20 | Mitsubishi Electric Corp | Electric signal processing circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS6248954B2 (en) | 1987-10-16 |
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