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| Number | Title | Issue Date |
| 5874828 | Off-state voltage generating circuit capable of regulating the magnitude of the off-state voltage An OFF-state voltage generating circuit regulates an OFF-state voltage level, for thin film transistors (TFT) in a liquid crystal display (LCD). A voltage generator receives a common voltage signal and an inverted common voltage signal and generates an OF... | 02/23/1999 |
| 5866026 | Method and apparatus for accommodating tolerances in a mold for concrete products A adjustable mold box assembly for forming molded concrete products includes a pair of opposed substantially parallel end plates joined at both ends by a pair of opposed substantially parallel mounting brackets. A selected plurality of partition plates ex... | 02/02/1999 |
| 5821736 | Charge mode control in a battery charger A control circuit controls a battery charger so as to prevent damage to NiCAD or NiMH batteries resulting from overheating due to overcharging. During charging, the battery voltage is monitored through a filter, buffer, amplifier and sample and hold circu... | 10/13/1998 |
| 5820459 | Method and apparatus for operating networked gaming devices A system for monitoring and configuring gaming devices interconnected over a high-speed network is disclosed. The system can support a file server, one or more floor controllers, one or more pit terminals, and other terminals all interconnected over the n... | 10/13/1998 |
| 5799430 | Unified apparatus for forming a frame corner A one-piece frame corner joining apparatus for joining two picture frame members at a predetermined angle to form a frame corner. The frame members are preferably standard aluminum frames having a longitudinal channel for receiving corner hardware. The jo... | 09/01/1998 |
| 5780840 | Close contact type image sensor having integrally moded reflective surfaces A close contact type image sensor having an improved structure and manufacturing process utilizes a body having integral reflective surfaces to eliminate assembly steps. The body and reflective surfaces are formed using different plastic materials in a si... | 07/14/1998 |
| 5777864 | Resonant converter control system having resonant current phase detection A resonant convertor control system regulates a resonant AC current based on the amount of input power consumed by the system. The switching frequency and resonant AC current are limited by a phase difference assurance circuit that compares the phase of a... | 07/07/1998 |
| 5774402 | Initialization circuit for a semiconductor memory device An initialization circuit for a semiconductor memory device includes an initialization signal generator that generates an initialization signal in response to a specific sequence of reset control signals. A transfer unit activates a reset signal for reset... | 06/30/1998 |
| 5774321 | Power supply circuit with load protection function A power supply circuit interrupts power to a load in response to a short-circuit or an open-circuit condition and automatically restores power after a momentary short-circuit. A short-circuit detector monitors the current flowing through the load and gene... | 06/30/1998 |
| 5774012 | Charge-pumping circuit for semiconductor memory device A charge-pumping circuit of a semiconductor memory device for generating a voltage higher than an applied supply voltage, including a first MOS transistor having gate and drain terminals through which the supply voltage is received and a source terminal t... | 06/30/1998 |
| 5770928 | Dimming control system with distributed command processing A dimming control system includes dimmer modules which receive dimming level information from a control module. Each dimmer modules includes a microprocessor which provides internal intelligence for controlling power to a load in response to the dimming l... | 06/23/1998 |
| 5770926 | Feedback control system of an electronic ballast which detects arcing of a lamp The present invention relates to a feedback control system and method for controlling an electronic ballast for driving a lamp where the lamp requires preheating of a cathode of the lamp in order for the electronic ballast to successfully discharge into t... | 06/23/1998 |
| 5767752 | Frequency modulator with center frequency and modulation controlled by an input signal A frequency modulator controls the center frequency and modulation factor at the same time with one control signal. The frequency modulator includes a voltage-to-current converter that receives an input voltage signal to be modulated, a reference voltage ... | 06/16/1998 |
| 5764039 | Power factor correction circuit having indirect input voltage sensing A power factor correction circuit for a boost-type voltage converter determines the input voltage by sensing the rate at which the current through an inductor changes when a switching transistor is turned on. The circuit includes a current sense circuit w... | 06/09/1998 |
| 5762561 | Custom golf scorecard design automation The system for creating a custom golf scorecard comprises a computer interface for receiving a user selection of one of a predetermined plurality of scorecard designs and user input textual data. The design selection, the textual data and a file name to i... | 06/09/1998 |
| 5760446 | Electrostatic discharge structure of semiconductor device An electrostatic discharge structure of a semiconductor device is provided. The structure includes a semiconductor substrate doped with P-type impurities; an N-type well formed in a predetermined region of the semiconductor substrate; a P-type pocket well... | 06/02/1998 |
| 5757714 | Semiconductor memory device with on-chip boosted power supply voltage generator A semiconductor memory device uses three different power supply voltage levels including an internal IVcc, ground Vss and a boosted level Vpp more positive than the internal Vcc. A precharge control circuit in the memory device includes at least one NMOS ... | 05/26/1998 |
| 5754487 | Bit line precharge circuit An SRAM, which includes a plurality of bit line pairs, a memory cell connected between each pair of the bit lines, and an address transition detection circuit for detecting transition of the externally applied address signal to generate a detection pulse ... | 05/19/1998 |
| 5752882 | Method and apparatus for operating networked gaming devices A system for monitoring and configuring gaming devices interconnected over a high-speed network is disclosed. The system can support a file server, one or more floor controllers, one or more pit terminals, and other terminals all interconnected over the n... | 05/19/1998 |
| 5751642 | Voltage control circuit for input and output lines of semiconductor memory device A voltage control circuit is used to control the voltage levels on input and output lines of a semiconductor memory device. A load transistor is controlled by feeding back an output voltage of the input and output lines in order to increase data access sp... | 05/12/1998 |
| 5741183 | Method and apparatus for operating networked gaming devices A system for monitoring and configuring gaming devices interconnected over a high-speed network is disclosed. The system can support a file server, one or more floor controllers, one or more pit terminals, and other terminals all interconnected over the n... | 04/21/1998 |
| 5732029 | Method and circuit for testing memory cells in semiconductor memory device A test control circuit and method of testing a memory cell in a semiconductor memory device. The test control circuit includes a memory cell array having a plurality of normal memory cells to store data on a semiconductor substrate and a plurality of redu... | 03/24/1998 |
| 5721474 | Method and apparatus for preventing excessive current flow in a motor A motor control circuit comprises a current command circuit generates a current command signal proportional to a selected motor speed. A comparator generates a comparator output signal proportional to the difference between the current command signal and ... | 02/24/1998 |
| 5715210 | Low power semiconductor memory device A low power semiconductor memory device for minimizing power consumption is disclosed. The low power semiconductor memory device includes a memory cell array with a plurality of memory cells connected to a pair of bit lines, and having first and second pa... | 02/03/1998 |
| 5666864 | Earth boring drill bit with shell supporting an external drilling surface A method for making an earth boring drill bit which includes an outer shell having an external surface adapted to carry cutting elements and a unitary shank and bit core which is fitted into the outer shell. The shell and bit core are threadably engaged w... | 09/16/1997 |
| 5629652 | Band-switchable, low-noise voltage controlled oscillator (VCO) for use with low-q resonator elements Both differential and single-ended band-switchable VCOs are described. The single-ended version of the voltage controlled oscillator in its most basic form includes a load, two transistors, two delay elements, and a switchable current source. The first tr... | 05/13/1997 |
| 5593350 | Video game card having interrupt resistant behavior A high precision game card generates a digital signal corresponding to each analog input signal from a controller. Each digital signal has a digital value proportional to the number of "reads" to the game card by a computer microprocessor. The digital sig... | 01/14/1997 |
| 5570025 | Annunciator and battery supply measurement system for cellular telephones A cellular phone both annunciates and retrieves stored mail messages using a single keypad button. A cellular basestation transmits voice mail messages to the cellular phone indicating that voice mail is ready for retrieval. A light emitting diode (LED) i... | 10/29/1996 |
