GB1260827A - Input signal converter for a solid state logic circuitry - Google Patents
Input signal converter for a solid state logic circuitryInfo
- Publication number
- GB1260827A GB1260827A GB694770A GB694770A GB1260827A GB 1260827 A GB1260827 A GB 1260827A GB 694770 A GB694770 A GB 694770A GB 694770 A GB694770 A GB 694770A GB 1260827 A GB1260827 A GB 1260827A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- neon lamp
- circuit
- terminals
- solid state
- 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
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
- H03K17/795—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors
-
- 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
- H03K19/017545—Coupling arrangements; Impedance matching circuits
- H03K19/017572—Coupling arrangements; Impedance matching circuits using opto-electronic devices
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Manipulation Of Pulses (AREA)
Abstract
1,260,827. Semi-conductor switching circuits. SQUARED CO. 13 Feb., 1970 [7 April, 1969], No. 6.947/70. Heading H3T. [Also in Division G1] An .input signal converting circuit 10 for a solid state logic circuit comprises a pair of input terminals 24, 26 connected through a switch 42 to an A.C. or D.C. voltage source S, two circuits 34, 36 connected in parallel across the terminals, the first circuit 36 including a neon lamp 14, the second circuit 34 having a lower impedance than the first and including an incandescent lamp 12, and an output circuit 48 including a light sensitive photoresistor 16 physically positioned to be illuminated by the neon lamp and an impedance 22 connected in series with the photoconductor -across a D.C. voltage source 28, 32 for the logic circuit, there being an output terminal 30 which provides an output signal change when the photoconductor is illuminated by the neon lamp. The neon lamp, resistor and remaining circuitry may be enclosed in a suitable enclosure with only the lamp 12 and terminals located on the exterior thereof. In this the lamp 12 functions to indicate when the neon lamp is being energized by the source S. The low impedance path provided by the lamp 12 ensures that any stray voltage signals occurring at the terminals 24, 26 do not result in illumination of the neon lamp.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US81401069A | 1969-04-07 | 1969-04-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1260827A true GB1260827A (en) | 1972-01-19 |
Family
ID=25213980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB694770A Expired GB1260827A (en) | 1969-04-07 | 1970-02-13 | Input signal converter for a solid state logic circuitry |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1260827A (en) |
-
1970
- 1970-02-13 GB GB694770A patent/GB1260827A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |