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| Number | Title | Issue Date |
| 7391241 | Bidirectional deglitch circuit A deglitch circuit utilizes a first flip-flop coupled to the input signal and a second flip-flop coupled to the output of a circuit with feedback from the output to gates to control first and second inputs to the first flip-flop. In an alternative arrangement, a cou... | 06/24/2008 |
| 7135895 | Semiconductor device having output circuit adaptively suppressing SSO noise A semiconductor device capable of detecting and suppressing SSO noise after the semiconductor device has been mounted on a board. The semiconductor device includes an output circuit for outputting parallel output signals in accordance with a clock signal, an SSO noi... | 11/14/2006 |
| 7088153 | Data storage latch structure with micro-electromechanical switch Micro-electromechanical switches (MEMS) are configured to form a data storage latch to reduce power consumption, to reduce the space used in an integrated circuit, and to improve performance of the integrated circuit. MEMS are implemented at the wiring layer connect... | 08/08/2006 |
| 6981076 | Mechanism to disable dynamically a computer audio input/output connector An apparatus and method are presented for dynamically disabling a first audio input/output (“I/O”) connector when an audio I/O device is coupled to a second audio I/O connector, locating the disablement point to reduce significantly any spurious noise coupled on... | 12/27/2005 |
| 6873216 | Chattering eliminating apparatus including oscillation circuit using charging and discharging operations In a chattering eliminating apparatus, a coincidence circuit receives an input signal of the apparatus and an output signal of the apparatus to determine whether or not a level of the input signal of the apparatus is the same as a level of the output signal of the a... | 03/29/2005 |
| 5907252 | Driving circuit for electromagnetic relay A driving circuit for the electromagnetic relay provides a coil of the electromagnetic relay with stepped voltage having a first voltage which is slightly larger than a minimum operating voltage which caused the coil to generate magnetic field capable of ... | 05/25/1999 |
| 5574428 | Message display unit for motor vehicles A display unit for presenting messages from a motor vehicle in which messages are selected for presentation based upon the number of interruptions in the power supplied to the display unit. A power supply provides power to an interrupter, which produces, ... | 11/12/1996 |
| 5554895 | Electronic latching circuit for momentary contact switches A switch circuit for activating and deactivating a motor vehicle cruise control includes a 555 model timer integrated circuit which has a trigger terminal, a reset terminal, a threshold terminal, a control voltage terminal and an output terminal. A substa... | 09/10/1996 |
| 5500836 | Circuit for suppressing the effect of rebounds and parasitic commutations of a contactor A circuit for suppressing the effect of rebounds of a contactor (2) on a control signal (C) produced thereby, wherein the contactor (2) ideally changes from one position to another position and remains in the other position for a predetermined time. The c... | 03/19/1996 |
| 5406440 | Soft-closure electrical contactor An electrical contactor including a control system for regulating the voltage applied to the contactor's coil. The control system is adapted for gradually increasing the applied voltage and the resultant current through the coil so that contact closure ta... | 04/11/1995 |
| 5386159 | Glitch suppressor circuit and method A resettable glitch suppression circuit integrated into each input control line of a semiconductor chip to provide flexibility for each control line as to whether or not, and if so when, the glitch suppression circuit is operable.... | 01/31/1995 |
| 4952826 | Signal input circuit utilizing flip-flop circuit A signal input circuit of a type in which an input signal voltage is compared with a reference voltage is disclosed. A first gate is connected in series with a first input transistor between a first terminal of an input amplifier comprising a flip-flop ci... | 08/28/1990 |
| 4903282 | Electronic coin-counting control A device for counting events, such as deposit of coins, providing a control signal after an easily preset number of events has been counted. A binary counter has a parallel output register, with a simple switch and diode connected between each output term... | 02/20/1990 |
| 4853685 | Switch monitoring arrangement with remote adjustment capability having debounce circuitry for accurate state determination An independent transmitter/receiver, or a transponder in a communication system, receives signals distorted by outside, unwanted conditions such as noise, line capacitance, and so forth. The status of a switch is checked at periodic times, by pulsing, rat... | 08/01/1989 |
| 4761566 | Input circuit for converting contact signal into a voltage signal An input circuit which converts a contact signal into a voltage signal is provided. The voltage signal output corresponding to the ON/OFF operation of the contact differs in polarity with methods of connection of the contact to a current limiting resistor... | 08/02/1988 |
| 4713564 | Bounce-nullifying switch unit The opening and closure of the contacts of a push-button actuated switch duces across impedance means a voltage which is stably high and low when such contacts are maintained closed and open, respectively. Bouncing of the contacts after their initial clo... | 12/15/1987 |
| 4626708 | Electronic logic to enhance switch reliability in detecting openings and closures of redundant switches A logic circuit is used to enhance redundant switch reliability. Two or more switches are monitored for logical high or low output. The output for the logic circuit produces a redundant and failsafe representation of the switch outputs. When both switch o... | 12/02/1986 |
| 4594724 | Bypass method and apparatus for debouncing a mechanical switching element in a data communications network An apparatus and method, for connecting a node to and disconnecting a node from a high speed data communications network, has a dead man switching element and high speed solid state switching circuitry interconnected therewith to avoid the effects of mech... | 06/10/1986 |
| 4349076 | Change-over switch with de-chattering device for electronic weighing scales A circuit for electronic weighing scales, for example, for shifting or switching the circuit between two states and at the same time for de-chattering mechanical contacts, wherein the circuit includes two inverted gates with crossed feedback constituting ... | 09/14/1982 |
| 4251740 | Continuous focus proportional controller A circuit for use with switches that have contacts which may bounce upon closure or opening and produce a series of alternate closure and opening signals. The circuit operates eliminate the effect of all but the first of the closures or openings and thus ... | 02/17/1981 |
| 4198579 | Input circuit for portable electronic devices There is disclosed an input circuit for portable electronic devices comprising an exteriorly operable member for delivering an operating signal to a portable electronic device and including a first flip-flop set in synchronism with an edge of said operati... | 04/15/1980 |
| 4185210 | Contact de-bouncing circuit with common mode rejection A circuit for preventing the simultaneous application of contradictory input commands to a system and for filtering-out signals of shorter duration than a given period. The circuit includes an EXCLUSIVE-OR type gate adapted to receive input commands, whos... | 01/22/1980 |
| 4180747 | Switching circuit for eliminating the effects of contact bounce A switching circuit is disclosed for eliminating the effects of contact bounce in a movable contact switch connected between a voltage source and the input of a switching transistor. When the movable contact switch is closed, bouncing of the contacts unde... | 12/25/1979 |
| 4159497 | Switch debounce circuit A switch debounce circuit buffers the mechanical contacts of a double throw single pole switch into digital logic. It is essentially an active debounce circuit requiring only one wire from the switch to the circuit. The circuit includes a pair of opposite... | 06/26/1979 |
| 4138613 | Switching circuit A switching circuit including a flip-flop which receives a switching signal that sets the flip-flop and which receives a reset signal which resets the flip-flop. A latching circuit, responsive to a clock signal, is connected to receive an output signal of... | 02/06/1979 |
| 4134026 | Mechanical switch circuit comprising contact conditioning means Two reed switches are alternately closed by a magnet rotating with a shaft of a water meter or the like which is to be read remotely. A capacitor discharges through the reed switches when the same are closed, increasing the switch current without increasi... | 01/09/1979 |
| 4110748 | Keyswitch with hysteresis In a keyboard there are a plurality of key operated variable capacitor switches acting as differentiators to change the widths of electrical pulses which are then integrated to give signals whose level indicate which switches have been operated. The gain ... | 08/29/1978 |
| 4079269 | Switch means for cameras A switch means for electrically operating a device in a photographic camera is composed of a mechanical switch and a semiconductor switching element connected with the mechanical switch. The mechanical switch has a pair of contacts made of resilient condu... | 03/14/1978 |
| 4041329 | Manually selectable switch arrays A manually operable selector switch assembly comprises a plurality of manually operable switch means, a plurality of electrical switching circuits, and a corresponding plurality of bistable devices, one individual to each switching circuit and adapted in ... | 08/09/1977 |
| 4037116 | Up/down switch and switching signal generator A rotary switch is provided having a manually engageable control to which is attached an arm carrying a number of switch contact fingers for rotational motion with the control. A printed circuit board has concentric circular arrays of contact pads each of... | 07/19/1977 |
| 4015142 | Electric timing circuitry with means to compensate for switch chatter Electric timing circuitry for a camera comprises a series connection of a resistor and capacitor with the junction point of the two being connected to the input of a switching circuit. A series circuit composed of a starting switch for initiating the timi... | 03/29/1977 |
| 4005316 | Switching transient suppression circuit A circuit responsive to a change in the state of a switch for suppressing spurious electrical pulses associated with switch contact opening and closing. The suppression circuit includes a dual Schmitt trigger having its individual trigger circuits connect... | 01/25/1977 |
| 3999085 | Noise rejection circuit A digital interface especially useful for isolating a speedily responsive circuit from the effects of transients at its input such as may be caused, for example, by contact bounce in a relay. The circuit includes a monostable multivibrator connected to be... | 12/21/1976 |
| 3986039 | Toggle switch/indicator circuit A toggle switch indicator circuit for use with digital logic circuits which may be manually set and cleared by means of a manually operated push-button switch and which incorporates a debounce network and an indicator for displaying the state of the toggl... | 10/12/1976 |
| 3978838 | D-C power supply and ignition system A device for generating high voltages from a relatively low voltage primary power source and finding particular usage in automobile engine ignition, television high voltage supply and the like, the device consisting of a periodically energized one-shot mu... | 09/07/1976 |
| 3974419 | Electronic flash apparatus with inhibition of contact bounce false triggering False triggering of the flash termination switch in a series termination electronic flash unit as a result of contact bounce is eliminated. Gating means inhibits the contacts from triggering the flash termination switch unless a voltage at a selected poin... | 08/10/1976 |
| 3973140 | Control circuits for vehicle rear window heaters A vehicle rear window heater control comprises a touch switch, a bistable circuit driven between its two states by the touch switch, a relay operated by the bistable circuit so that the heater is controlled by the touch switch and a monostable circuit tri... | 08/03/1976 |
| 3962699 | Switch closure responsive logic signal generation means A command signal circuit accepting switch input information from a plurality of mechanical switches introducing undesired contact bounce, and providing a single clean output command signal. The circuit accomodates the plurality of input switches with circ... | 06/08/1976 |
| 3946254 | No-bounce electronically controlled switch circuit An electronically controlled switch circuit for providing a single noise-free output pulse from the output of a modified master-slave flip flop circuit in response to an input signal alternately applied to set and clock pulse inputs from the output of a s... | 03/23/1976 |
| 3943381 | Pulse generating apparatus having a chattering pulse elimination circuit A pulse generating apparatus which generates rectangular wave signal by opening and closing of a mechanical contact and has a differentiation circuit to output such pulse signal as corresponding to the rising position of said signal. Said apparatus has a ... | 03/09/1976 |
