GB1534521A - Input circuit for a misfet integrated circuit - Google Patents
Input circuit for a misfet integrated circuitInfo
- Publication number
- GB1534521A GB1534521A GB5085475A GB5085475A GB1534521A GB 1534521 A GB1534521 A GB 1534521A GB 5085475 A GB5085475 A GB 5085475A GB 5085475 A GB5085475 A GB 5085475A GB 1534521 A GB1534521 A GB 1534521A
- Authority
- GB
- United Kingdom
- Prior art keywords
- input
- misfet
- circuit
- voltage
- gate
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
- H03K19/0185—Coupling arrangements; Interface arrangements using field effect transistors only
- H03K19/018507—Interface arrangements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
- H03M11/02—Details
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Logic Circuits (AREA)
- Input From Keyboards Or The Like (AREA)
- Electronic Switches (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
1534521 FET circuits HITACHI Ltd 11 Dec 1975 [6 Jan 1975] 50854/75 Heading H3T A circuit for using a high voltage as input to a MISFET circuit, e.g. an inverter M3, M4 comprises an enhancement MISFET M1 connected between the input and a lower voltage supply V GG and a second MISFET M2 in series between the input and the gate of the inverter driver M4. When the high voltage is applied to the input, M1 turns off and M2 limits the voltage on the gate of M4 to (V GG -Th) or (V GG + Th) where Th is the threshold voltage according to whether M2 is of enhancement or depletion type. Resistors R1, R2 may be provided to protect the MISFETS gate insulation from breakdown by interference voltages. As described the invention is used in a desk-top calculator in which the high-voltage supply to a display 2 is connected to a key switch 3 for connection to the input.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10375A JPS5550421B2 (en) | 1975-01-06 | 1975-01-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1534521A true GB1534521A (en) | 1978-12-06 |
Family
ID=11464749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5085475A Expired GB1534521A (en) | 1975-01-06 | 1975-12-11 | Input circuit for a misfet integrated circuit |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5550421B2 (en) |
DE (1) | DE2600198B2 (en) |
GB (1) | GB1534521A (en) |
HK (1) | HK57481A (en) |
MY (1) | MY8200172A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4489245A (en) * | 1980-09-10 | 1984-12-18 | Kabushiki Kaisha Toshiba | D.C. Voltage bias circuit in an integrated circuit |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54148364A (en) * | 1978-05-12 | 1979-11-20 | Nec Corp | Input/output circuit |
JPS5514744A (en) * | 1978-07-17 | 1980-02-01 | Nec Corp | Output circuit |
JPS6138001Y2 (en) * | 1980-06-25 | 1986-11-04 | ||
JPS5826933A (en) * | 1981-08-07 | 1983-02-17 | Matsushita Electric Ind Co Ltd | Heating cooker |
JPS5848530A (en) * | 1981-09-18 | 1983-03-22 | Nec Corp | Input circuit |
-
1975
- 1975-01-06 JP JP10375A patent/JPS5550421B2/ja not_active Expired
- 1975-12-11 GB GB5085475A patent/GB1534521A/en not_active Expired
-
1976
- 1976-01-05 DE DE19762600198 patent/DE2600198B2/en active Granted
-
1981
- 1981-11-26 HK HK57481A patent/HK57481A/en unknown
-
1982
- 1982-12-30 MY MY8200172A patent/MY8200172A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4489245A (en) * | 1980-09-10 | 1984-12-18 | Kabushiki Kaisha Toshiba | D.C. Voltage bias circuit in an integrated circuit |
Also Published As
Publication number | Publication date |
---|---|
DE2600198C3 (en) | 1978-10-26 |
DE2600198A1 (en) | 1976-07-08 |
MY8200172A (en) | 1982-12-31 |
DE2600198B2 (en) | 1978-03-02 |
JPS5550421B2 (en) | 1980-12-18 |
HK57481A (en) | 1981-12-04 |
JPS5179524A (en) | 1976-07-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19931211 |