Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 7429889 | Control system for programmable filters Control system for programmable filters, master-slave calibration system and fully programmable high precision filter for use in such control system, such filters being provided with a filter input and a filter output including a first, first order low pass filter s... | 09/30/2008 |
| 7263341 | Audio demodulating circuit and television broadcast receiver An audio demodulating circuit in accordance with the present invention for demodulating audio signals in a plurality of broadcast systems of mutually different frequency deviations such as the NTSC and the PAL, is arranged such that a connection between a trap circu... | 08/28/2007 |
| 7222056 | Method for minimizing the error of a measurable quantity In the framework of the method for minimizing the error of a measured variable, particularly a signal to be measured using filtering at variable bandwidth, the bandwidth is regulated on the basis of a physical criterion inherent to the method in such a ways that sig... | 05/22/2007 |
| 7164312 | Apparatus and method for pop-and-click suppression with fast turn-on time A circuit for audio amplification includes an amplifier and a first input resistor. The amplifier is arranged to provide an amplifier output signal that is based, in part, on a capacitively-coupled audio input signal. The capacitively-coupled audio input signal is b... | 01/16/2007 |
| 7053697 | System for tuning a corner frequency of a low pass filter An integrated circuit formed on a semiconductor chip, comprising a low pass filter circuit having a first resistor of a first resistance value and a capacitor of a first capacitance value, wherein the first resistance value and the first capacitance value determine ... | 05/30/2006 |
| 7038531 | Active filter An active filter comprising a first operational amplifier (10) disposed in an inverting integral configuration through a feedback capacitor (14) and a main resistor (15), and a divider (20) connected through a first connecting terminal ( | 05/02/2006 |
| 7002417 | RC and SC filter compensation in a radio transceiver Disclosed is apparatus for operating with an RC filter (26, 26A), and a corresponding method. The apparatus includes circuitry (32) for use in measuring an actual value of at least one filter component and a controller (34), coupled to the measu... | 02/21/2006 |
| 6975101 | Band-gap reference circuit with high power supply ripple rejection ratio A band-gap reference circuit includes a core reference circuit with a core output terminal, a voltage amplifier, coupled to the core output terminal and having a voltage amplifier terminal, a transconductance amplifier, coupled to the voltage amplifier terminal, and... | 12/13/2005 |
| 6972616 | Low-noise, fast-settling bias circuit and method A low-noise, fast-settling bias circuit includes a first and a second low pass filter, such as RC filters. The second filter initially shorts out a resistor of the first filter with a switch (set to low impedance) in parallel. Accordingly, a capacitor of the first f... | 12/06/2005 |
| 6930544 | Filter The object of the present invention is to obtain a high precision notch filter or all-pass filter. Therefore, two transconductance circuits for adjustment, which perform a voltage-current conversion of a difference between a voltage of a filter input terminal and a ... | 08/16/2005 |
| 6920799 | Magnetic flow meter with reference electrode An magnetic flow meter is provided which includes a reference electrode configured to electrically couple process fluid flowing within a flowtube of the flow meter. The reference electrode is adapted to measure potential of the process fluid. A current limiter is co... | 07/26/2005 |
| 6894557 | Method for tuning a corner frequency of a low pass filter An integrated circuit formed on a semiconductor chip, comprising a low pass filter circuit having a first resistor of a first resistance value and a capacitor of a first capacitance value, wherein the first resistance value and the first capacitance value determine ... | 05/17/2005 |
| 6791400 | Frequency-tuning loop used in the transconductor-capacitor filter A frequency-tuning loop of the invention used in the Transconductor-Capacitor filter is composed of: a first switching device and a second switching device, both having two signal-inputting ends and two signal-outputting ends for switching the output of two signals ... | 09/14/2004 |
| 6784728 | Low noise switched low pass filter with benign transients A switched low pass filter (18) minimizes transients generated during filter switching events and eliminates active circuit random noise. The switched low pass filter (18) includes a filter input terminal (26) for receiving an input base band si... | 08/31/2004 |
| 6741120 | Low power active filter and method Devices and method for effectively filtering a signal, particularly for a communication system, are disclosed. In this regard, an exemplary embodiment of the present invention may be construed as an AFE that includes a high-pass receive filter for a communication sy... | 05/25/2004 |
| 6703816 | Composite loop compensation for low drop-out regulator A composite loop compensation circuit and method for a low drop-out regulator configured to facilitate stable operation at very low output load currents is provided. An exemplary low drop-out regulator includes an error amplifier, a pass device, and a com... | 03/09/2004 |
| 6700360 | Output stage compensation circuit An output stage compensation circuit and method for a low drop-out regulator configured to facilitate stable operation while providing output voltage and current to downstream circuit devices is provided. An exemplary low drop-out regulator is configured ... | 03/02/2004 |
| 6674320 | System and method for orthogonal inductance variation A control system, method and apparatus is provided for an orthogonally variable inductor. A method and apparatus is also provided for voltage regulation. Regulation is provided without the use of Silicon devices, such as FET's, in the output current path.... | 01/06/2004 |
| 6670846 | Semiconductor integrated circuit including a filter with adjustable cut-off frequency A semiconductor integrated circuit includes a filter and a time-constant detecting circuit. The filter includes resistance elements; capacitance elements, each of which consists of a capacitance-value switching circuit that can vary the capacitance of the... | 12/30/2003 |
| 6642781 | Selectable equalization system and method A system and method have been provided for selectably equalizing an input signal to an integrated circuit (IC), to compensate for degradation in the transmission process. The selectable equalization circuit includes parallel equalizing and non-equalizing ... | 11/04/2003 |
| 6594613 | Adjustable bandwidth filter for process variable transmitter A process variable transmitter providing a transmitter output representing a process variable sensed by a sensor. The transmitter has a filter with a bandwidth which is automatically adjusted based on noise detected in a sensor output. When the transmitte... | 07/15/2003 |
| 6469574 | Selectable equalization system and method A system and method have been provided for selectably equalizing an input signal to an integrated circuit (IC), to compensate for degradation in the transmission process. The selectable equalization circuit includes parallel equalizing and non-equalizing ... | 10/22/2002 |
| 6448846 | Controlled phase-canceling circuits/systems By taking advantage of the ability to control the phase relationship between a processor's output (or portions of a processor's output) and the phase of the pre-processed signal (in a particular frequency range or ranges, a controlled accentuation or enha... | 09/10/2002 |
| 6271778 | High pass filtering with automatic phase equalization A system and method for selectively providing high pass filtering of two digital signals that are to be subsequently combined. Each of the first and second signals is passed through one of a high pass filter, an all-pass filter and a module that performs ... | 08/07/2001 |
| 6133783 | Phase jitter canceller A system and method for use in cancelling phase jitter in a Phase Locked Loop (PLL) circuit. A phase jitter canceller receives a phase error signal having phase jitter centered around a center frequency. A frequency and phase control circuit determines th... | 10/17/2000 |
| 6104235 | Integrated circuit with trimmable passive components An integrated circuit having a passive circuit component that can be adjusted following the manufacturing process to provide a precise absolute value for resistance or capacitance. A plurality of passive elements are selectively combinable using logic gat... | 08/15/2000 |
| 5815033 | Integrated circuit, variable filter adjusting method therefor, and electronic equipment using the same The present invention is to provide an integrated circuit capable of reducing the substrate area, a variable filter adjusting method for the integrated circuit, and an electronic equipment using the integrated circuit, in which disorder of an external ele... | 09/29/1998 |
| 5751184 | Low electrical power consumption filter circuit A low electric power consumption filter circuit includes an amplifying portion including an odd number of serial MOS inverters. A grounded capacitance is connected between an output of the amplifying portion and ground. A pair of balancing resistances con... | 05/12/1998 |
| 5719792 | Isolator An information system comprises an information network and a station apparatus capable of receiving information from the network and sending a command to the network. An isolator comprises a first diplex filter having an input/output (I/O) port coupled to... | 02/17/1998 |
| 5703523 | Filter circuit A filter circuit having a signal input terminal and a signal output terminal includes a first and a second buffer. The first buffer has an input end connected to a first resistor and to a first capacitor. A second capacitor having one end is connected to ... | 12/30/1997 |
| 5694419 | Shared resource modulator-demodulator circuits for use with vestigial sideband signals A common transceiver circuit for use as either a modulator or demodulator and that is implemented through a shared resource approach. This approach is particularly, though not exclusively, suited for vestigial sideband (VSB) signals. Specifically, a VSB t... | 12/02/1997 |
| 5673003 | Amplifier circuit having a variable bandwidth An amplifier circuit (204) having a variable bandwidth comprises an amplifier (300), a capacitive element (304), a first npn transistor (302), and a switch control circuit (306). The first npn transistor (302) has a base coupled to an output terminal (205... | 09/30/1997 |
| 5642003 | Power system switch incorporating a positive-sequence fundamental signal magnitude detector A power switching apparatus includes a positive-sequence fundamental signal magnitude detector. The positive-sequence fundamental signal magnitude detector derives a positive-sequence fundamental signal from a three-phase voltage signal carried by a power... | 06/24/1997 |
| 5469087 | Control system using harmonic filters A harmonic filter for active or adaptive noise attenuation control systems for obtaining the complex amplitude of a single harmonic component from a signal which contains one or more harmonic components.... | 11/21/1995 |
| 5317217 | Universal active filter A universal filter is provided with three inputs Vh, Vb and V1, with one output Vout, with two transconductance amplifiers Gm1, Gm2, with four capacitors mCO, (1-m)CO, CO and LCO and an amplifier K as well as a voltage follower VF. Depending on the connec... | 05/31/1994 |
| 5317216 | Active filter circuit An active filter circuit includes a first and second differential pairs each having a pair of transistors. A capacitor is connected to a collector of one transistor from each of the first and second differential pairs. A first and second negative feed-bac... | 05/31/1994 |
| 4963773 | Low pass/high pass filter phase shifter A compact low pass/high pass filter phase shifter including a semiconductor switch having a control electrode and first and second load electrodes; a first inductance connected in series with one load electrode and second inductance connected in series wi... | 10/16/1990 |
| 4893035 | Cascaded low pass/high pass filter phase shifter system A cascaded low pass/high pass filter phase shifter system including: a series of semiconductor switches each having a control electrode and first and second load electrodes; a capacitance connected in series between each control electrode and ground; an i... | 01/09/1990 |
| 4877979 | Filter arrangement A fitter comprising a first (R1) and a second (R2) resistor arranged in series between an input terminal (5) for receiving an input voltage (vi) and the input (2) of an amplifier. The amplifier (1) comprises a transistor (... | 10/31/1989 |
| 4857778 | Programmable universal active filter The invention relates to a microprocessor-programmable, universal active filter. The filter has an input section, an operational amplifier with two input nodes, a bandpass section, a lowpass section and control circuitry which, under clock control, period... | 08/15/1989 |
