GB1230088A - - Google Patents
Info
- Publication number
- GB1230088A GB1230088A GB4325767A GB1230088DA GB1230088A GB 1230088 A GB1230088 A GB 1230088A GB 4325767 A GB4325767 A GB 4325767A GB 1230088D A GB1230088D A GB 1230088DA GB 1230088 A GB1230088 A GB 1230088A
- Authority
- GB
- United Kingdom
- Prior art keywords
- limits
- measurements
- measurement
- capacitance
- voltage
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
- G01R31/2632—Circuits therefor for testing diodes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
Abstract
1,230,088. Testing diodes. PLESSEY CO. Ltd. Aug.28, 1968 [Sept.22, 1967], No.43257/67. Heading G1U. Variable-capacitance semi-conductor diodes are tested to determine whether the constants defining their voltage-capacitance relationship fall within prescribed limits by measuring their capacitance at one voltage and then at two further voltages, and determining whether the second and third measurements fall within limits which are dependent on the result of the first measurement. A device for indicating the limits for the second and third measurements comprises three logarithmic scales, Fig. 1a, one for each measurement, and a cursor having the marks shown in Fig. 1b. It is shown that if the diode constants are satisfactory, when the datum mask AA is aligned with the first measurement as indicated on the middle scale, the second and third measurements will lie within the limits shown by marks B 1 B 2 , C 1 C 2 respectively, and all three measurements will lie approximately on a straight line, as 1 rather than 2.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4325767 | 1967-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1230088A true GB1230088A (en) | 1971-04-28 |
Family
ID=10427962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4325767A Expired GB1230088A (en) | 1967-09-22 | 1967-09-22 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1230088A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0216403A1 (en) * | 1985-08-15 | 1987-04-01 | Koninklijke Philips Electronics N.V. | Variable capacitance diode tracking selection method and set of tracking-selected variable capacitance diodes |
-
1967
- 1967-09-22 GB GB4325767A patent/GB1230088A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0216403A1 (en) * | 1985-08-15 | 1987-04-01 | Koninklijke Philips Electronics N.V. | Variable capacitance diode tracking selection method and set of tracking-selected variable capacitance diodes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |