Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 7013122 | Ultra high isolation mixer A double balanced mixer for mixing an RF input signal with a local oscillator signal to provide at an output an intermediate frequency signal with high isolation over a wide frequency range. The mixer includes a local oscillator balun that is operable to receive a l... | 03/14/2006 |
| 7013123 | Wireless communication system A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip is provided with a plurality of electrode terminals along an edge port... | 03/14/2006 |
| 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 |
| 7002396 | Frequency converter A frequency converter includes a transistor pair having a first transistor and a second transistor respectively having collector terminals commonly connected to each other and emitter terminals commonly connected to each other, the commonly-connected collector termi... | 02/21/2006 |
| 7002403 | Transconductance/C complex band-pass filter A complex filter such as the channel select filter in a radio transceiver is implemented using a transconductance/C topology to benefit from the ability to tune such filters and thereby stabilize the output transfer function of the filter over variations in temperat... | 02/21/2006 |
| 6999746 | Image rejection mixer An image rejection mixer of reduced power dissipation includes a signal distributor supplied with local signals having a phase difference to distribute the local signals, a first and a second signal mixer for mixing the distributed local signals and RF signals havin... | 02/14/2006 |
| 6999747 | Passive harmonic switch mixer A passive harmonic switch mixer is shown that is immune to self mixing of the local oscillator greatly reducing leakage noise, pulling noise, and flicker noise when used in a direct conversion receiver or direct conversion transmitter circuit. The passive harmonic s... | 02/14/2006 |
| 6999745 | Mixer with a variable gain current-to-voltage converter A receiver comprising an input for receiving a first signal, said receiver further comprising a local oscillator for generating a periodical signal. The receiver further comprises a mixer for generating a third signal representative for a combination of a second sig... | 02/14/2006 |
| 6995808 | Television tuner A front end tuner for receiving TV signals and the like includes a frequency conversion circuit including a mixer for beating a local signal with received signals within a predetermined band of frequencies to provide selected signals within a predetermined band of f... | 02/07/2006 |
| 6993312 | Double balanced diode mixer with high output third order intercept point A double balanced mixer consisting of an RF balun, a local oscillator balun and a diode “quad” bridge circuit connected between the two baluns and where the IF output is taken at the center tap of the RF balun secondary transformer. A second harmonic termination... | 01/31/2006 |
| 6993314 | Apparatus for generating multiple radio frequencies in communication circuitry and associated methods A radio-frequency (RF) apparatus capable of transmitting RF signals includes transmitter path circuitry. The transmitter path circuitry includes a voltage-controlled oscillator (VCO) circuitry. The VCO circuitry generates a first signal that has a first frequency. A... | 01/31/2006 |
| 6993313 | Integrated structure of inductances with shared values on a semiconductor substrate An integrated circuit including a structure of inductances on a semiconductor substrate, intended for operating at frequencies greater than several hundreds of MHz, including a first inductance formed by a conductive track and having first and second terminals respe... | 01/31/2006 |
| 6992519 | Method and apparatus providing cancellation of second order intermodulation distortion and enhancement of second order intercept point (IIP2) in common source and common emitter transconductance circuits A transconductor circuit includes a first input device M1 and a second input device M2 each having a control terminal coupled to a radio frequency input signal, and a bias setting device MB having a control terminal coupled to the ra... | 01/31/2006 |
| 6990327 | Wideband monolithic tunable high-Q notch filter for image rejection in RF application A notch filter with a high Q factor, which is integrated with a first and a second cascoded LNA, is totally contained on an integrated chip. The notch filter, comprising two Q-enhancement circuits, is coupled to the second differential LNA. The two Q-enhancement cir... | 01/24/2006 |
| 6989705 | High linearity passive mixer and associated LO buffer An RF communications system includes a transmit node for transmitting an RF information signal and a receive node for receiving the transmitted RF information signal. The receive node includes a passive mixer coupled to an amplifier for producing an IF or baseband d... | 01/24/2006 |
| 6987983 | Radio frequency monolithic integrated circuit and method for manufacturing the same The purpose of this invention is to realize a radio frequency monolithic integrated circuit high in performance, small in size and low in cost, where transistors and passive elements are arranged on a chip in which a conductive silicon substrate functions as a groun... | 01/17/2006 |
| 6985712 | RF device and communication apparatus using the same An RF device includes a first substrate having a lower relative dielectric constant, a first RF circuit for a lower frequency band provided in the first substrate, a second substrate having a higher relative dielectric constant larger than the lower relative dielect... | 01/10/2006 |
| 6983135 | Mixer gain calibration method and apparatus A gain calibration circuit for a radio frequency mixer in a wireless transceiver includes a reference signal generator that generates a reference signal. A comparator receives the reference signal and a second signal that is proportional to current flowing through t... | 01/03/2006 |
| 6982588 | Inverse function method for semiconductor mixer linearity enhancement The mixer circuit includes a differential rf input driver; a differential local oscillator input circuit coupled to the differential rf input driver; a non-linear load coupled to the differential local oscillator input circuit wherein the non-linear load compensates... | 01/03/2006 |
| 6980039 | DC-DC converter with noise spreading to meet spectral mask requirements A DC—DC converter includes a variable frequency oscillator, a control system and a power train. The DC—DC converter is well suited for use in a cell phone. The control system uses the output of the oscillator to control the power train. The oscillator varies its... | 12/27/2005 |
| 6980774 | Radio frequency integrated circuit A radio frequency (RF) integrated circuit (IC) includes a local oscillation module, analog radio receiver, analog radio transmitter, digital receiver module, digital transmitter module, and digital optimization module. The local oscillation module is operably couple... | 12/27/2005 |
| 6980779 | RF transmitter using digital-to-RF conversion An RF transmitter having two digital to RF-conversion devices that combine the D/A conversion function and the upconversion function by a RF-carrier or IF-signal. The device comprises a plurality of parallel unit cells, each of which is a mixer cell type converter h... | 12/27/2005 |
| 6980353 | Frequency synthesiser A frequency synthesiser for generating wideband signals for zero Hz up to frequencies in the millimetre wave band provides the ability for arbitrarily fine increments in output frequency. The synthesiser has an optical comb generator that provides a set of reference... | 12/27/2005 |
| 6973290 | Radio architecture A digital radio transceiver integrated circuit includes MOS transistors with normal threshold voltages in the digital circuits, and with reduced threshold voltages in at least some of the analog RF components. This allows the transceiver to be reduced in size and we... | 12/06/2005 |
| 6973297 | Method and apparatus for down-conversion of radio frequency (RF) signals with reduced local oscillator leakage This patent describes a method of removing the LO-leakage and 1/f noise problems associated with direct conversion RF receivers and other demodulators. In order to solve this problem a virtual LO™ signal is generated within the RF signal path which is tuned to the... | 12/06/2005 |
| 6972610 | High linearity passive mixer and associated LO buffer An RF communications system includes a transmit node for transmitting an RF information signal and a receive node for receiving the transmitted RF information signal. The receive node includes a passive mixer coupled to an amplifier for producing an IF or baseband d... | 12/06/2005 |
| 6969978 | DC-DC converter with reduced electromagnetic interference A DC-DC converter includes a variable frequency oscillator, a control system and a power train. The DC-DC converter is well suited for use in a cell phone. The control system uses the output of the oscillator to control the power train. The oscillator varies its fre... | 11/29/2005 |
| 6970687 | Mixer The invention provides a mixer comprising a multiplier circuit having a first and a second mixer, a generator for generating two first and two second control signals for controlling the first and second mixers, wherein the first and second control signals are in eac... | 11/29/2005 |
| 6961554 | Power amplifier including a desensitized bias circuit A desensitized bias circuit for a power amplifier includes, in one embodiment, a notch filter incorporated into the bias circuit. The notch filter behaves as a resonant circuit at the operating frequency of the power amplifier, thus coupling to ground any RF energy ... | 11/01/2005 |
| 6959180 | LTCC fet mixer A wide bandwidth mixer has a low temperature co-fired ceramic substrate. The substrate has a top layer, a bottom layer and inner layers. Vias extend through the substrate. A local oscillator balun and an RF balun are located on the inner layers and connected to the ... | 10/25/2005 |
| 6956252 | Hybrid integrated circuit device In preferred embodiments, a compact a hybrid integrated circuit device 1 can be provided. A conductive pattern 12 is formed on the top surface of a circuit substrate 10, on the top surface of which an insulating layer 11 has been provided... | 10/18/2005 |
| 6957057 | Switched capacitor mixer circuit to attain high gain and linearity in radio frequency receivers By implementing the sampling process at an AC ground node, rather than at a signal side, and adding a gated transistor (610 and 620) in the signal path, the present invention reduces the interdependency between gain and linearity in a switched capacito... | 10/18/2005 |
| 6957055 | Double balanced FET mixer with high IP3 and IF response down to DC levels A double balanced FET mixer that has a high third order intercept point and an intermediate frequency response that goes to direct current levels. The mixer includes a local oscillator terminal, a RF terminal and an intermediate frequency terminal. The mixer has a p... | 10/18/2005 |
| 6954089 | Frequency converter having low supply voltage A frequency converter configured to convert a first current signal having a first frequency into a second current signal having a second frequency different from the first frequency is disclosed, which comprises an adder configured to add the first current signal an... | 10/11/2005 |
| 6952573 | Wireless receiver with stacked, single chip architecture A monolithic wireless receiver suitable for use in a global positioning system (GPS) or other radio frequency (RF) application suitably includes a mixed-mode integrated circuit and a stacked memory device. The mixed mode integrated circuit appropriately includes a d... | 10/04/2005 |
| 6947720 | Low noise mixer circuit with improved gain A mixer circuit of the present invention includes a gain stage configured to receive a first signal and a modulated bias current, and in accordance therewith, produce an output signal, the gain stage generating a first current and receiving the modulated bias curren... | 09/20/2005 |
| 6946895 | Mixer device including an amplifier circuit An amplifier circuit comprises a differential amplifier configured by a differential pair of transistors, a common emitter amplifier connected in parallel to the differential amplifier and configured by a pair of common-emitter configuration transistors, input and o... | 09/20/2005 |
| 6944438 | Transconductance stage and device for communication by Hertzian channel equipped with such a stage A transconductance stage includes at least one principal bipolar transistor having a base linked to an input terminal, a collector linked to an output terminal, and an emitter linked to a supply terminal through a resistor. At least one bipolar compensation transist... | 09/13/2005 |
| 6944437 | Electronically programmable multimode circuit An electronically programmable multimode circuit is described. More particularly, the present invention is an electronically programmable multimode circuit that includes a first path and a second path wherein a mode and a signal directional flow direction is control... | 09/13/2005 |
