Class 329/370 - Including diode demodulator device

Subclass of Class 329 - Demodulators
Definition: Subject matter where the AM demodulator incorporates a unidirectional
No. of patents: 24
Last issue date: 10/30/2007

Number	Title	Issue Date
7288857	Self-latching power supply apparatus A self-latching power supply apparatus is disclosed. The apparatus comprises an activation transistor in electrical communication with an input voltage source and a battery-switching transistor. Voltage detection circuitry may be intermediate the input voltage sourc...	10/30/2007
7205832	Temperature compensated, high efficiency, controlled input impedance diode detector A diode detector comprising a detector network adapted to detect and multiply the detected voltage coupled to a divider network that comprise diodes in equal number to the number of diodes in the detector network, provides a passive detector applicable to any applic...	04/17/2007
6825715	Temperature compensated, high efficiency diode detector A diode detector comprising a detector network adapted to detect and multiply the detected voltage coupled to a divider network that comprise diodes in equal number to the number of diodes in the detector network, provides a passive detector applicable to any applic...	11/30/2004
6639459	Demodulator using digital circuitry A demodulator converts a voltage input to an output voltage. The demodulator has a voltage-controlled oscillator (VCO), a counter, a holding apparatus, and a digital compare apparatus. The VCO generates a signal having a frequency proportional to the anal...	10/28/2003
6255901	Demodulator for ask-modulated signals having small modulation depth A demodulator circuit for demodulating a signal ASK-modulated with modulation pulses equal in duration, and having a small depth of modulation and large dynamic range comprises an amplitude limiter (10) through which an amplitude-dependent current flows w...	07/03/2001
6204088	Glue-free backside illuminated photodiode apparatus and fabrication process Apparatus and method for fabricating a backside illuminated photodiode array is described which does not use epoxy, and therefore has better transmission characteristics. The method uses indium or other coldweldable metal to fasten the detectors to the tr...	03/20/2001
6204727	Precision controlled RF power detector circuit A controlled detector circuit for generating a detector current to the input of a selected circuit. An unwanted operational voltage is generated on the input of the selected circuit affecting the precision of the detector circuit. The controlled detector ...	03/20/2001
6194978	Interrupt modulation method and apparatus The invention is directed toward a simple and cost effective method of wirelessly transmitting digital information with an analog carrier signal. The method, referred to as Interrupt Modulation IM, will allow broadcasters to make the transition from an an...	02/27/2001
6046631	Detector coupled to transmission line by microstrip line The present invention provides a detector comprising a microstrip line having one end being grounded and another end connected to a main transmission line, a detection diode connected to the microstrip line, and a smoothing circuit for smoothing a signal ...	04/04/2000
6031419	Demodulator for contactless chip card A contactless chip card, receiving binary data transmitted by radio frequency, includes a demodulator for the binary data. The demodulator includes a circuit for the detection of the transmitted signals, a rectifier circuit, a bandpass filter, two compara...	02/29/2000
5594384	Enhanced peak detector An enhanced peak detector circuit for the amplitude demodulation of an incoming amplitude modulated signal is provided. In its simplest form, the enhanced peak detector circuit includes a forward biased NPN transistor, a peak detecting segment coupled to ...	01/14/1997
5539356	DC coupled amplifier fed by an RF detector A DC coupled amplifier fed by an RF detector is taught which has greater dynamic range capabilities than techniques in the prior art. An illustrative embodiment of the present invention advantageously comprises a low-off set voltage, low-offset current di...	07/23/1996
5418449	Device for the detection of power at the output of an electronic circuit The disclosure relates to the servo-control of an electronic circuit that calls for the detection of the power delivered at its output. The disclosed device is essentially constituted by a field-effect transistor with zero bias VDS mounted betw...	05/23/1995
5264735	Superconducting non-linear device A superconducting non-linear device comprising a superconducting conductor, a current source associated with the conductor for applying to the conductor a bias current, and a control device associated with the current source for selectably varying the bia...	11/23/1993
4890066	Envelope detector Envelope detector comprising a differential amplifier (A), a full-wave rectifier circuit and a smoothing filter (AF), which differential amplifier (A) converts an input voltage into a pair of current signals in phase opposition and which full-wave rectifi...	12/26/1989
4866396	Temperature stabilized RF detector A temperature stabilized RF detector has a first diode connected between an input terminal for receiving an RF signal and an output terminal for outputting the detection signal of the RF signal, and a second diode connected between the input terminal and ...	09/12/1989
4839709	Detector and mixer diode operative at zero bias voltage This invention is directed to an NPIN (or PNIP) diode structure and epitaxial process for fabricating same wherein the thickness and doping levels of the intermediate layers of the structure and such that these layers are substantially depleted of majorit...	06/13/1989
4791380	Detector circuit with dual-diode compensation A detector circuit for radio-frequency signals is formed of a pair of matched diodes disposed on a common substrate which is heated by a temperature responsive feedback circuit to stabilize the temperature of the substrate and the diodes. A capacitor is c...	12/13/1988
4594557	Traveling wave video detector A traveling wave video detector utilizing microwave integrated circuit techniques provides increased dynamic range, increased rf bandwidth up to 100 Ghz and improved impedance matching at high input power levels. The video detector comprises an artificial...	06/10/1986
4492926	Amplitude modulation detector The amplitude modulation detection device, which is provided with an AM (amplitude modulation) responsive to first and second input signals for maintaining a constant D.C. level output signal, the first signal being the AM signal, and the second signal pr...	01/08/1985
4425549	Fin line circuit for detecting R.F. wave signals A fin line apparatus, within a rectangular waveguide, for detecting R.F. signals utilizes metallic film conductors, disposed on both surfaces of a planar dielectric centered in the waveguide parallel to its sidewalls, for forming aligned channels, a first...	01/10/1984
4403194	Closed loop amplitude demodulator An improved substantially "zero distortion" four quadrant modulator of the type including a pair of differential elements respectively coupled to the Y input port terminals of the modulator and exhibiting nonlinear amplitude transfer functions, includes t...	09/06/1983
4370620	Efficient high performance envelope detector with controlled decay envelope detection In this controlled decay envelope detector, a capacitor is used to hold the momentary peaks of the input signal. Its only discharge current path is controlled by a circuit which simultaneously monitors the capacitor voltage and the input signal such that ...	01/25/1983
4143330	Detector circuit A detector circuit comprising a detector element which includes a diode having a high-frequency input terminal which receives a predetermined DC bias voltage, and a parallel circuit constituted by a resistor and a capacitor and connected between the outpu...	03/06/1979

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Class 329/370 - Including diode demodulator device