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Class Information
Number: 455/333
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Frequency modifying or conversion > Particular frequency conversion structure or circuitry > Transistor or integrated circuit
Description: Systems wherein the frequency conversion means comprises an active element, three or more terminal device or devices constructed of a semiconductor material having a specific resistance, for example, of the order of that of germanium, silicon, selenium, etc. (e.g., transistor).
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620382 |
Frequency converter capable of preventing level of intermediate frequency signal from lowering due to rise in temperature |
Nov. 17, 2009 |
| 7616934 |
Switched impedance transformer for semiconductor circuits |
Nov. 10, 2009 |
| 7616937 |
Subharmonic mixer capable of reducing noise and enhancing gain and linearlty |
Nov. 10, 2009 |
| 7613442 |
Switch circuit and method of switching radio frequency signals |
Nov. 3, 2009 |
| 7609792 |
Multiple-input multiple-output multichip transceiver with correlated clock signals |
Oct. 27, 2009 |
| 7606546 |
Variable frequency clock generator for synchronizing data rates between clock domains in radio frequency wireless communication systems |
Oct. 20, 2009 |
| 7606323 |
Carrier leak reduction transmitter circuit |
Oct. 20, 2009 |
| 7599677 |
Charge pump circuit having switches |
Oct. 6, 2009 |
| 7593700 |
Controllable radio frequency stage with variable gain/attenuation, in particular incorporated into the transmission chain of a cellular mobile telephone, and corresponding control method |
Sep. 22, 2009 |
| 7593708 |
Methods of operating electronic devices, and methods of providing electronic devices |
Sep. 22, 2009 |
| 7587187 |
Ultra wide band, differential input/output, high frequency active mixer in an integrated circuit |
Sep. 8, 2009 |
| 7583212 |
Reduced noise radio frequency integrated circuit |
Sep. 1, 2009 |
| 7583946 |
Wireless communication system and method using clock swapping during image rejection calibration |
Sep. 1, 2009 |
| 7580694 |
Contactless integrated circuit with high-efficiency electrical power supply circuit |
Aug. 25, 2009 |
| 7580693 |
Passive reflection mixer |
Aug. 25, 2009 |
| 7570936 |
Sub-harmonically pumped mixer |
Aug. 4, 2009 |
| 7567784 |
Tuner, broadcast signal processing apparatus comprising the same, and broadcast signal processing method |
Jul. 28, 2009 |
| 7567818 |
Mobile device with wide-angle optics and a radiation sensor |
Jul. 28, 2009 |
| 7564801 |
Router reachability verification in IPv6 networks |
Jul. 21, 2009 |
| 7565116 |
High frequency module |
Jul. 21, 2009 |
| 7565128 |
High performance low noise amplifier |
Jul. 21, 2009 |
| 7561866 |
RFID tags with power rectifiers that have bias |
Jul. 14, 2009 |
| 7555263 |
Adaptive radio transceiver |
Jun. 30, 2009 |
| 7551901 |
Linear high powered integrated circuit amplifier |
Jun. 23, 2009 |
| 7551909 |
CMOS transceiver with dual current path VCO |
Jun. 23, 2009 |
| 7548734 |
Multi-band RF receiver |
Jun. 16, 2009 |
| 7548740 |
Variable frequency clock generator for synchronizing data rates between clock domains in radio frequency wireless communication systems |
Jun. 16, 2009 |
| 7538741 |
Impedance matched passive radio frequency transmit/receive switch |
May. 26, 2009 |
| 7539471 |
Method and apparatus to provide variable gain in a radio receiver front end |
May. 26, 2009 |
| 7536166 |
Monolithically integrated circuit |
May. 19, 2009 |
| 7536165 |
Offset correction for down-conversion mixers |
May. 19, 2009 |
| 7532055 |
CMOS-based receiver for communications applications |
May. 12, 2009 |
| 7529532 |
Switch circuit and method of switching radio frequency signals |
May. 5, 2009 |
| 7529529 |
Low noise, high-linearity RF front end receiver |
May. 5, 2009 |
| 7526245 |
Method and system for single chip satellite set-top box system |
Apr. 28, 2009 |
| 7521981 |
Mixer with carrier leakage calibration |
Apr. 21, 2009 |
| 7522902 |
Adaptive DC offset compensation apparatus and method thereof |
Apr. 21, 2009 |
| 7519387 |
Apparatus and method for wireless coupling of integrated circuit chips |
Apr. 14, 2009 |
| 7519334 |
Multi-mode I/O circuitry supporting low interference signaling schemes for high speed digital interfaces |
Apr. 14, 2009 |
| 7519335 |
Digital modulation signal mixer |
Apr. 14, 2009 |
| 7515891 |
Programmable gain amplifier (PGA) with AGC in receiver section |
Apr. 7, 2009 |
| 7515879 |
Radio frequency circuit module |
Apr. 7, 2009 |
| 7514981 |
Mixer circuit |
Apr. 7, 2009 |
| 7511557 |
Quadrature mixer circuit and RF communication semiconductor integrated circuit |
Mar. 31, 2009 |
| 7512394 |
Wideband up-conversion mixer |
Mar. 31, 2009 |
| 7512395 |
Receiver and integrated AM-FM/IQ demodulators for gigabit-rate data detection |
Mar. 31, 2009 |
| 7509101 |
Method and apparatus for reducing leakage in a direct conversion transmitter |
Mar. 24, 2009 |
| 7509110 |
High-order harmonic rejection mixer using multiple LO phases |
Mar. 24, 2009 |
| 7509111 |
Integrated circuit having a mixer circuit |
Mar. 24, 2009 |
| 7509112 |
Wideband image rejection mixer |
Mar. 24, 2009 |
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