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35-42.Ībidi, Asad A., “Radio-Frequency Integrated Circuits for Portable Communications,” Custom IC Conference, San Diego, CA, May 1994, pp. Wireless receiver having crystal filter at outputs of preamplifierįM Demodulator with variable bandpass filterĬharge coupled device filters and modems incorporating such filtersĪbidi, Asad A., “CMOS-only RF and Baseband Circuits for a Monolithic 900 MHz Wireless Transceiver,” Bipolar Circuits & Tech.Mtg., Minneapolis, Oct. Integrated filter circuit having switchable selected parallel filter paths Varying bandwidth digital signal detector Long range police radar warning receiver with multiple array averaging Integrated resonant circuit with temperature compensated quality factor Superheterodyne radio receiver with digital automatic frequency control for a local oscillator Receiver having a local oscillator first synchronized to a reference frequency and then to a received signal Ultra low-power integrated circuit for pseudo-baseband down-conversion of GPS RF signalsĬommunication system with control signal based tuning
Radio receiving device for measuring an electric field level of a receiving channel and adjacent channels using common components Radio frequency signal reception using frequency shifting by discrete-time sub-sampling down-conversion Micro-receiver for receiving a high frequency frequency-modulated or phase-modulated signal Radio receiver with amplitude limiter prior to mixer and band limiting filterĬontinuous time filter with programmable bandwidth and tuning loop Portable telephone capable of decreasing noise Various techniques are described for enabling a complete receiver to be implemented on a single chip which receives an antenna input signal and outputs a digital data signal.Īrticle comprising a micro-machined filter To further improve the signal to noise ratio of the receiver, the IF filter is tuned within a range so as not to include any integer multiple or integer divisor of the timing reference frequency. Since the magnitude of the control signal reflects the process variations, the bias currents are adjusted based on the control signal to offset these variations in other portions of the receiver. To compensate for process variations in the implementation of the IC, bias currents setting the operating conditions for various amplifiers and other components in the system are adjusted based on frequency control signals in a PLL circuit in the local oscillator. A baseband filter is controlled by external control signals to have one of a plurality of discrete frequency response bandwidths depending on the type of signal to be received. A decoder is formed on chip for performing logical operations on demodulated digital data. The chip only requires an external antenna for operation. Failure Diagnosis (no output, no power LED, etc.A single chip receiver is disclosed herein.First and Last Name with complete Shipping Address.Please call us during normal business hours at 1-80 (option #1) and be prepared with the following information: Use our RFTECH:Knowledge Base for troubleshooting assistance. Many products we receive are sent back with No Trouble Found, usually due to incorrect installation. Prior to requesting an RA, try to diagnose the failure.
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