Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 5134355 | Power factor correction control for switch-mode power converters A PFC controller (FIG. 5) provides power factor correction and peak current limiting for a switch-mode power converter of any topology (buck, boost or buck-boost), without having to directly sense inductor current. The PFC control technique involves using... | 07/28/1992 |
| 5134087 | Fabricating a two-phase CCD imager cell for TV interlace operation A CCD imager cell (36, 38) is formed at a face of a semiconductor substrate (10) and has first (36) and second (38) phase regions. A first clocked well (14) is provided for receiving charge integrated in the first phase region (36). A second clocked well ... | 07/28/1992 |
| 5124271 | Process for fabricating a BiCMOS integrated circuit A process and structure for resolving the divergent etching requirements of a relatively thick base oxide (62) and a relatively thin gate oxide (64) in a BiCMOS integrated circuit. The necessity of etching base oxide (62) is eliminated by extending nitrid... | 06/23/1992 |
| 5122759 | Class-A differential amplifier and method A circuit for the Class-A differential amplification of two input signals. A first constant current source 22 is connected between a voltage supply terminal 3 and a node 8. A second constant current source 24 is connected between the supply terminal 3 and a no... | 06/16/1992 |
| 5118971 | Adjustable low noise output circuit responsive to environmental conditions An output circuit is provided which contains voltage control circuitry (14) which drives the gates of the output transistors (18, 20) such that the change in current remains relatively constant. The desired voltage output of the voltage control circuitry ... | 06/02/1992 |
| 5114066 | Voice coil programmable wire tensioner A voice coil actuated wire tensioner is used on a wire bonder in conjunction with a primary wire clamp to provide accurate control of the bond wire and looping of the bond wire between ball bonding of one end of a bond wire and stitch bonding of the other... | 05/19/1992 |
| 5111375 | Charge pump A charge pump comprises high voltage and low voltage supply rails coupled to first and second capacitors via switching circuitry. The switching circuitry is operable to charge the first and second capacitors to desired voltages to generate a desired outpu... | 05/05/1992 |
| 5111071 | Threshold detection circuit A threshold detection circuit (10) is provided which comprises an input node (12) and an output node (14). The input node (12) is coupled to a current mirror (22) through a resistor (32). The current mirror (22) is further coupled to another current mirro... | 05/05/1992 |
| 5105762 | Support and seal structure for CCVD reactor Reaction gases are prevented from escaping from a reaction chamber through the use of flexible or gas seals between the interface of the reaction chamber and the junction used to connected successive reaction chambers.... | 04/21/1992 |
| 5104510 | Plating system An enclosed plating wheel system includes a fixed mounted shaft, feed and return spargers mounted on the shaft, and a plating wheel rotates around the fixed mounted spargers as a result of a lead frame strip being pulled around the plating wheel. A belt i... | 04/14/1992 |
| 5103450 | Event qualified testing protocols for integrated circuits A set of event qualified test protocols for use in testing integrated circuits is disclosed. A boundary scan architecture for use in the integrated circuit (10) comprises input and output test registers (12,22) having functions controlled by an event qual... | 04/07/1992 |
| 5103169 | Relayless interconnections in high performance signal paths Field Effect Transistors are used to replace mechanical relays and to minimize the distance a Device Under Test (DUT) must drive a signal path to the receiver, to minimize insertion losses in critical paths to the DUT, and generally increase reliability i... | 04/07/1992 |
| 5101174 | Advanced charge detection amplifier for high performance image sensors A charge detection amplifier embodying the invention comprises a first amplification stage (Q10-Q15) coupled to an input terminal 70 and having an output node 72. Capacitive feedback is provided by a capacitor 82 coupled between an input node 71 and said ... | 03/31/1992 |
| 5101123 | CMOS to ECL translator circuit and methodology A translator circuit 82 and operation thereof is disclosed including a control signal generator 48 and an ECL output buffer circuit 84. Control signal generator 48 includes a CMOS inverter comprising transistors 52 and 54. The CMOS inverter is connected t... | 03/31/1992 |
| 5100499 | Copper dry etch process using organic and amine radicals An etch process for etching copper layers that is useable in integrated circuit fabrication is disclosed which utilizes organic and amine radicals to react with copper, preferrable using photoenergizing and photodirecting assistance of high intensity ultr... | 03/31/1992 |
| 5097406 | Lead frame lead located for wire bonder A lead frame locater is used to locate actual positions of lead frame leads in respect to the semiconductor chip to provide accurate wire bonding of the semiconductor chip to the lead frame leads.... | 03/17/1992 |
| 5095447 | Color overlay of scanned and reference images for display A laser pattern inspection and/or writing system which writes or inspects a pattern on a target on a stage, by raster scanning the target pixels. Inspection can also be done by substage illumination with non-laser light. A database, organized into frames ... | 03/10/1992 |
