Bizarre Patents
Mountable Printable Placard With Headband
A resilient headband in a shape for being mounted on the head of the user. The headband is equipped with a longitudinal slotted member for holding a placard.
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| Number | Title | Issue Date |
| 8098091 | Method in the compensation of unlinearities in an amplifier, and uses of the method and the amplifier In a method and an amplifier for the compensation of unlinearities e.g. of the class D type, wherein an audio signal is pulse-width modulated, e.g. with a carrier wave signal in the form of a triangular signal to provide a pulse-width modulated small-signal, the so-... | 01/17/2012 |
| 7986183 | Amplifying circuit and amplifying method An amplifying circuit includes: a waveform modifying unit which changes the signal value in the second section in such a manner so as to reduce the difference between the signal strength of a DC component of the input signal and the limit value that limits the varia... | 07/26/2011 |
| 7888998 | Low-voltage CMOS error amplifier with implicit reference An analog error amplifier includes an amplifier circuit and a replica bias circuit that together produce an output signal representing a difference between an input signal and a reference signal. The amplifier circuit produces the output signal in response to the in... | 02/15/2011 |
| 7432761 | Amplifier circuit, semiconductor device and electronic apparatus It is desirable that some voltage can be supplied as emergency backup even upon occurrence of abnormality such as a failure. The amplifier circuit in a semiconductor device supplies an output signal having a voltage produced by amplifying an input voltage Vin from a... | 10/07/2008 |
| 7215197 | Programmable gain instrumentation amplifier with improved gain multiplexers In one embodiment, a programmable gain instrumentation amplifier comprises an input stage configured with a differential precision current conveyor circuit. The current conveyor circuit may be implemented with operational amplifiers coupled to gain-setting resistors... | 05/08/2007 |
| 7190935 | Amplifier power detection circuitry The present invention provides an efficient way to detect the transmit power provided by an amplifier. A power sense signal indicative of the transmit power of the amplifier is generated and fed back to a control system, which will react accordingly to control input... | 03/13/2007 |
| 7152800 | Preamplifier system having programmable resistance A biasing scheme is disclosed that helps reduce current noise in an associated device, such as, for example, a magneto-resistive device. The biasing scheme provides for setting a resistance path in a preamplifier, which is operative to energize the associated device... | 12/26/2006 |
| 7088174 | Offset cancellation and slice adjust amplifier circuit A method and apparatus to provide slice adjustment and offset cancellation in a high frequency limiting amplifier is described. ... | 08/08/2006 |
| 7072478 | Microphone preamplifier A microphone preamplifier. An electrical signal from a microphone is received via a shielded cable by an input stage cascaded with an output stage. The input stage contains an impedance converter and a phase inverter and receives feedback that reduces input capacita... | 07/04/2006 |
| 7062237 | Power amplifier (PA) with improved power regulation A circuit for regulating the power provided to a load connected to an output of a power amplifier. The circuit includes an amplitude detector that outputs a voltage corresponding to the amplitude of the signal outputted by the power amplifier. This output voltage is... | 06/13/2006 |
| 7039124 | Apparatus and method for compensating for analog quadrature modulation error An apparatus and method for compensating for an analog quadrature modulation (AQM) error in a linearization apparatus for AQM-modulating a digital predistorted signal and outputting the AQM-modulated signal through a high-power amplifier. In the apparatus and method... | 05/02/2006 |
| 7005915 | Series bridge circuit with amplifiers Two bridge type transducers are coupled in series with their outputs each driving one of a pair of differential amplifiers, with the outputs tied together in a push-pull configuration. In further embodiments, push-pull operation is obtained by matching amplifier gai... | 02/28/2006 |
| 6809596 | DC offset cancellation circuit, system and method Described are a circuit and system to provide an output signal in response to composite input signal comprising an AC signal component and a DC signal component. An amplifier provides an amplified voltage signal in response to a voltage representative of the composi... | 10/26/2004 |
| 6774715 | BiCMOS AC filter circuit An alternating current filter circuit for a BiCMOS differential amplifier has a circuit that computes a base current of the BiCMOS differential amplifier and a circuit that generates an offset current based upon the computing. ... | 08/10/2004 |
| 6700443 | Reduction of sensitivity of an amplifier to an offset voltage The invention relates to a method of amplifying an input signal having a DC component and an AC component. The method includes the steps of: comparing the input signal with a reference value, generating an intermediate signal by subtracting from the input... | 03/02/2004 |
| 6657488 | Offset correction and slicing level adjustment for amplifier circuits A slice and offset circuit is provided that uses a digital integrator in the feedback loop of the offset cancellation circuitry. A slice circuit receives an indication of a desired slice voltage and supplies a signal to specify the slice level, which is c... | 12/02/2003 |
| 6608525 | Operational transconductance amplifier and filter circuit The operational transconductance amplifier comprises a MOS field-effective transistor that controls the mutual conductance. The central voltage measurement circuit and the voltage addition circuit shift a gate voltage of the MOS field-effective transistor... | 08/19/2003 |
| 6603354 | Method and apparatus to generate an optimum common-mode voltage in analog differential circuits A method and apparatus to generate an optimum common-mode voltage in analog differential circuits are described. A first output voltage is generated as a function of a power supply voltage and a positive saturation voltage in a differential amplifier circ... | 08/05/2003 |
| 6580315 | System and method of maintaining an amplifier common-mode output voltage A low-power solution for maintaining an amplifier common-mode output voltage, regardless of whether the amplifier is on or off, that does not degrade the performance of the amplifier through the use of a passgate in the signal path.... | 06/17/2003 |
| 6577187 | Powered transducer preamplifier with DC level shifting circuit A powered transducer preamplifier includes a preamplifier circuit that DC couples the preamplifier input with the preamplifier output. A biasing circuit is coupled to the preamplifier input to apply a bias voltage to power the transducer, and a DC level s... | 06/10/2003 |
| 6335641 | Automatic input threshold selector An automatic input threshold selector includes a maximum value level decision circuit, and an input threshold setting circuit. The maximum value level decision circuit decides, among m+1 level layers defined by m maximum value decision levels, a level lay... | 01/01/2002 |
| 6232816 | Signal level monitoring circuit A signal level monitoring circuit for outputting either voltage or current corresponding to an input signal level, includes a variable gain unit for obtaining a predetermined output level without being dependent on a gain, when the input signal level is a... | 05/15/2001 |
| 5999045 | Amplification circuit which includes an input-current compensation device An amplification circuit comprising a device for compensating for its input current. The amplification circuit includes an amplifier and a capacitor located on the input side of the amplifier. The input-current compensation device consists of a current ge... | 12/07/1999 |
| 5801867 | DC-coupled receiver for shared optical system A dc-coupled receiver for a shared optical system includes an input feedback amplifier circuit which establishes a dc reference baseline voltage level for incoming packets of data. A pair of sample-and-hold circuits are connected in parallel to receive an... | 09/01/1998 |
| 5587681 | DC restoration circuit In a D.C. restoration circuit for a digital FM radio receiver, in which demodulated signals may be presented at the output of the demodulator as low-level differential signals superimposed on a variable D.C. level, the differential signal paths are capaci... | 12/24/1996 |
| 5585756 | Gated integrator with signal baseline subtraction An ultrafast, high precision gated integrator includes an opamp having differential inputs. A signal to be integrated is applied to one of the differential inputs through a first input network, and a signal indicative of the DC offset component of the sig... | 12/17/1996 |
| 5576658 | Pulse shaping circuit There is disclosed a rectangular filter which has a simple configuration and is capable of producing an improved rectangular wave. An input step wave is differentiated by a differentiator circuit and amplified by a first amplifier. The output from the amp... | 11/19/1996 |
| 5430766 | Burst mode digital data receiver A dc-coupled packet mode digital data receiver, for use with an optical bus uses peak detectors to adaptively establish an instantaneous logic threshold at the beginning of a data burst. A dc compensator, responsive to outputs of the peak detectors, shunt... | 07/04/1995 |
| 5426389 | System for DC restoration of serially transmitted binary signals A device for restoring DC and non-zero average components of a serially transmitted binary signal which has been AC coupled. The device comprises an input port for the binary signal, a clamping circuit, a feedback network, a summing node, and an output po... | 06/20/1995 |
| 5059918 | Procedure and apparatus for amplification of a burst signal A controllable amplifier, which has two symmetrical outputs, at which two output signals mirror-symmetrical with respect to each other are present, is used for amplification of a burst signal. To achieve the largest possible eye opening of the signals to ... | 10/22/1991 |
| 5051708 | Amplifier arrangement with output power boosting In order to boost the output power of a first amplifier (A1) a second amplifier (A2) can increase the supply voltage difference across the first amplifier (A1). However, variations of the supply voltage difference result in comparatively high distortion. ... | 09/24/1991 |
| 4736391 | Threshold control with data receiver A binary data receiver data modulated light signals and applies them to a photodetector for producing electrical data signals which are amplified and applied to a data decision circuit. The data decision circuit compares the instantaneous value of the amp... | 04/05/1988 |
| 4714828 | Optoelectric transducer An optoelectronic transducer is proposed which includes a PIN diode (2) that delivers a current that is proportional to a light signal that is received. The diode is connected to the input of an inverting amplifier (4) that delivers a voltage signal v | 12/22/1987 |
| 4603303 | Level compensation circuit In an amplifier including an AC amplifier, its operation level shifts according to input waveforms. When a positive input signal is, for example, inputted, the circuit feeds out a synthesized signal to the amplifier in which signal a positive and negative... | 07/29/1986 |
| 4599571 | Level compensation circuit In an amplifier including an AC amplifier, its operation level shifts according to input waveforms. This invention describes a circuit to eliminate the level shift. An output of the AC amplifier is fed to a level shift detector, wherein the level shift is... | 07/08/1986 |
| 4463317 | FM demodulator with regulation of the output D.C. component A frequency modulation detector, includes an FM (frequency modulation) demodulator, an adder responsive to first and second signals for maintaining a constant D.C. level output signal, the first signal being the FM signal, and a feedback circuit connected... | 07/31/1984 |
| 4374362 | Instrument zeroing circuit An electronic interface circuit for coupling a source of analog signals to a measuring and/or recording device whereby the time varying component of the analog signal can be separated from any steady-state component, such as a DC bias, which may be presen... | 02/15/1983 |
| 4366440 | Adjustable contrast compressor A feedback amplifier is configured as a contrast compressor for video signals including a reference blanking level. A feedback resistance is divided into two resistors coupled at a juncture. Contrast compression is accomplished by a diode coupled to the j... | 12/28/1982 |
| 4363977 | Device for discriminating between two values of a signal with DC offset compensation A device for discriminating between two values of a signal using DC offset compensation including an automatic gain control circuit, a peak detector circuit and a feedback path from the peak detector circuit to the input circuit of the automatic gain cont... | 12/14/1982 |
| 4336615 | Linear loading for PWM filter An AM broadcast transmitter uses a PWM modulator that requires a pulse width filter. It has been found that the filter load varies over the modulation cycle resulting in distortion. To overcome this problem, a varying voltage is applied to an RF driver st... | 06/22/1982 |
