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| Number | Title | Issue Date |
| 8188787 | Peak detector for detecting peaks in a modulated signal A demodulator for demodulating a modulated signal has a peak detector (206) with an input (100) coupled to receive the modulated signal and an output (207) to supply a peak detector output signal. The peak detector has a charge storer (314 | 05/29/2012 |
| 8159289 | Chip card having an adjustable demodulation unit The present invention shows a contactless chip card comprising a controllable demodulation unit for demodulating an amplitude-modulated carrier signal, a measuring unit for determining a degree of modulation of the modulated carrier signal, and a control unit for co... | 04/17/2012 |
| 8115538 | Modulation and demodulation circuit The invention relates to the field of modulation and demodulation circuits, such as envelope detectors used to demodulate amplitude-modulated (AM) signals. By coupling an analog circuit to a port of a digital component, an envelope detector can be obtained, which ac... | 02/14/2012 |
| 7986182 | Fully differential demodulator with variable gain, and method for demodulating a signal A demodulator is provided for demodulating an amplitude-modulated input signal defined by a carrier signal having a carrier frequency modulated by a modulating signal, the demodulator including an amplifier stage having a gain and structured to receive the amplitude... | 07/26/2011 |
| 7868690 | Comparator with sensitivity control A comparator has a differential input stage, a current source coupled to the differential input stage for providing a tail current to one side of the differential input stage, and a differential load coupled to the differential pair and having at least one diode cou... | 01/11/2011 |
| 7847627 | Demodulator for amplitude-modulated signals A demodulator circuit (DMOD) for amplitude-modulated signals is defined which comprises a threshold switch module (SWS), wherein a signal output (SA) of the threshold switch module (SWS) is connected to the output (DA) of the demodulator circuit (DMOD) and a signal ... | 12/07/2010 |
| 7663432 | Fully differential demodulator with variable gain, and method for demodulating a signal A demodulator includes input terminals, for receiving an input signal, and an amplifier stage having a gain. The input signal is amplitude-modulated and is defined by a carrier signal at a carrier frequency and by a modulating signal. The demodulator includes, moreo... | 02/16/2010 |
| 7570109 | System and method for demodulating amplitude modulated signals A system and method for demodulating amplitude modulated input signals uses two comparators and a charge pump circuit, which is positioned between the two comparators, to produce a demodulated signal of an amplitude modulated input signal. The two comparators and th... | 08/04/2009 |
| 7439800 | Amplitude demodulator for an electromagnetic transponder An amplitude demodulator comprising a capacitive element for filtering a first D.C. component of a received signal, an element for detecting edges in the signal provided by the capacitive element, and at least one switching element for forcing, at least after detect... | 10/21/2008 |
| 7397301 | Pyroelectric demodulating detector A pyroelectric demodulating detector (also termed a pyroelectric demodulator) is disclosed which utilizes an electrical resistor stacked upon a pyroelectric element to demodulate an rf or microwave electrical input signal which is amplitude-modulated (AM). The pyroe... | 07/08/2008 |
| 7321735 | Optical down-converter using universal frequency translation technology A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated w... | 01/22/2008 |
| 7307472 | Digital demodulator with a low sampling frequency An amplitude demodulation method and device comprising a converter sampling an input signal having its sampling frequency corresponding to three times the modulation carrier frequency. ... | 12/11/2007 |
| 7302011 | Quadrature frequency doubling system The frequency doubler of the present invention operates to provide an in-phase signal and a quadrature signal, each having a frequency equal to twice the frequency of a reference signal. The in-phase and quadrature signals are based on signals that are 0 degrees, 45... | 11/27/2007 |
| 7295826 | Integrated frequency translation and selectivity with gain control functionality, and applications thereof Methods and apparatuses for frequency selectivity and frequency translation, and applications for such methods and apparatuses, are described herein. The method includes steps of filtering an input signal, and down-converting the filtered input signal. The filtering... | 11/13/2007 |
| 7292835 | Wireless and wired cable modem applications of universal frequency translation technology Frequency translation and applications of same are described herein, including cable modem applications. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and fil... | 11/06/2007 |
| 7292093 | Envelope detector with DC level shifting An envelope detector that does not generate an undesirable DC offset at its DC output signal. An envelope detector according to the present teachings includes a circuit for performing a DC level shift on an AC input signal applied to the envelope detector such that ... | 11/06/2007 |
| 7272368 | System and method for reduced deviation time domain FM/PM discriminator to achieve a reduced bandwidth frequency or phase modulation communications channels The present disclosure provides a receiver for receiving a narrow frequency deviation frequency modulated or phase modulated base band signal including a mixer for mixing the received narrow frequency deviation signal to generate an intermediate frequency signal, a ... | 09/18/2007 |
| 7265610 | Error detection in a signal in amplitude modulation A method and a circuit for detecting a modulation factor in a signal received in amplitude modulation, including comparing the received signal with two first values, comparing the received signal with two second values ranging between the first two values, and consi... | 09/04/2007 |
| 7215723 | Demodulator for an amplitude-modulated alternating signal The invention concerns a demodulator of an amplitude-modulated signal (Vdb), characterised in that it comprises a peak detecting cell (DCR) capable of extracting the reference modulating signal (Vpeak1) of the modulated signal (Vdb); a first demodulator (FE) ... | 05/08/2007 |
| 7113547 | Data communication system, controller device and data communication method In a controller device, when a first transmitting signal is at a “L” level, a first operation voltage is high and the amplitude of signals CK and ICK is large, and on the contrary, the amplitude is small when the first transmitting signal is at a “H” level. ... | 09/26/2006 |
| 7110444 | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen... | 09/19/2006 |
| 7109845 | Circuit arrangement for signal detection having current mirror with cascode coupled transistors A circuit arrangement for detecting a received signal includes a rectifier with an input connected to a receiving antenna for rectifying an encoded received signal, a signal capacitor connected to an output of the rectifier, a discharge current sink connected to the... | 09/19/2006 |
| 7110435 | Spread spectrum applications of universal frequency translation Frequency translation and spread spectrum applications of same are described herein. Such applications include, but are not limited to, unified down-conversion and de-spreading, unified up-conversion and spreading, RAKE receivers utilizing unified down-conversion an... | 09/19/2006 |
| 7106188 | Method and system for providing an activation signal based on a received RF signal A method and apparatus are described for providing an activation signal based on a received radio frequency (RTF) signal. The apparatus includes an RF receiver configured to admit a received RF signal in a given frequency band and a converter configured to convert t... | 09/12/2006 |
| 7082171 | Phase shifting applications of universal frequency translation A universal frequency translation module (UFT) frequency translates an electromagnetic (EM) input signal by sampling the EM input signal according to a periodic control signal (also called an aliasing signal). By controlling the relative sampling time, the UFT modul... | 07/25/2006 |
| 7072390 | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen... | 07/04/2006 |
| 7054296 | Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation Frequency translation and applications of same are described herein, including wireless local area network (WLAN) applications such as IEEE Standard 802.11 WLANs. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, ... | 05/30/2006 |
| 7039372 | Method and system for frequency up-conversion with modulation embodiments A method and system is described wherein an information signals is gated at a frequency that is a sub-harmonic of the frequency of the desired output signal. In the modulation embodiments, the information signal is modulated as part of the up-conversion process. In ... | 05/02/2006 |
| 7034621 | Divider circuit and oscillating circuit including the same A divider circuit including a plurality of latch circuits which are connected in series such that each of the latch circuits is responsive to a control signal to latch data which is output from a preceding latch circuit in the series, and a logic circuit which recei... | 04/25/2006 |
| 7027786 | Carrier and clock recovery using universal frequency translation Coherent detection of a received EM signal using universal frequency translation (UFT) is described herein. The received EM signal is sampled according to a sub-harmonic LO signal, where the LO signal is in frequency and phase coherence with the received EM signal. ... | 04/11/2006 |
| 7010286 | Apparatus, system, and method for down-converting and up-converting electromagnetic signals Methods, systems, and apparatuses for down-converting and up-converting an electromagnetic signal. In embodiments, the invention operates by receiving an electromagnetic signal and recursively operating on approximate half cycles of a carrier signal. The recursive o... | 03/07/2006 |
| 7006805 | Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service A receiver having multi-mode and multi-band functionality and capabilities is described herein. The receiver is capable of selectively operating over a plurality of bands and channels. The receiver operates in a plurality of modes, including but not limited to a sin... | 02/28/2006 |
| 6996388 | High-frequency signal receiver A receiver is operable even if including a local oscillator generating a signal at high frequencies but not in a wide frequency range. The receiver includes: a first frequency converter for mixing a received signal with a first local oscillation signal to convert th... | 02/07/2006 |
| 6985540 | AM demodulator An AM demodulator includes an APC detection circuit that compares phases of an AM-modulated input signal and a signal output from a VCO. However, the APC detection circuit multiples the two signals before their comparison. As a result, even if the phases of the inpu... | 01/10/2006 |
| 6975165 | Method and system for the conversion of phase shift keying signals (PSK) into amplitude shift keying signals (ASK) A system for the conversion of digital phase shift keying (PSK) signals into digital amplitude shift keying (ASK) signals. The system consists of a power divider, PDIV, with an input, into which a PSK signal at a frequency of 2f is injected, where f is... | 12/13/2005 |
| 6946989 | Transponder, including transponder system In a transponder (19) for amplification of a received signal (60) into an antenna (1), to a signal (61) for retransmission, and where the retransmitted signal (61) possibly may have information superimposed, a quenched oscillator (... | 09/20/2005 |
| 6933777 | AM detecting apparatus with overmodulation detecting function An AM detecting apparatus includes a voltage comparator And an AND circuit. The voltage comparator compares a detection signal a low-pass filter outputs with a no-signal potential. The AND circuit outputs, when the amplitude of an AM signal is higher than the refere... | 08/23/2005 |
| 6907088 | Contactless IC card for preventing incorrect data recovery in demodulation of an amplitude-modulated carrier wave In a contactless IC card that performs envelope detection on an ASK-modulated carrier wave and demodulates the carrier wave to recover data piggybacked thereon, demodulation is suspended during periods where there is no possibility of a change of a data value (from ... | 06/14/2005 |
| 6897719 | Demodulation circuit and demodulation method Two capacitors are provided for demodulating an amplitude-modulated signal and can be supplied with a signal that is rectified by a diode and that is at a voltage. The half-cycles of this signal are used for alternately charging the first or second capacitor using a... | 05/24/2005 |
| 6861901 | Voltage follower circuit A voltage follower comprising a first field-effect transistor (MN1) whose gate forms the input of the voltage follower. Further provided is a second field-effect transistor (MN2) whose drain connected to the gate forms the output of the voltage followe... | 03/01/2005 |
