Abstract: An input signal (IN) is filtered (605) to remove aliases and a switched capacitor network (610) undersamples this signal to provide a downconverted, near-baseband signal. An amplifier (615) adjusts the amplitude of this signal to match a digitizer (620). The digitized output is converted into first phase and second phase signals which are then filtered (640) and decimated (645) to further reduce the sampling rate. The downconverted first and second phase signals, rather than higher frequency signals, control the gain function (AGC) for the amplifier (615). The switched capacitor network (610) provides for both tuning and downconversion of the desired signal to a lower frequency for further processing, thus reducing the frequency and power requirements of an associated amplifier and analog-to-digital converter (digitizer).

Abstract: An input signal (IN) is filtered (605) to remove aliases and a switched capacitor network (610) undersamples this signal to provide a downconverted, near-baseband signal. An amplifier (615) adjusts the amplitude of this signal to match a digitizer (620). The digitized output is converted into first phase and second phase signals which are then filtered (640) and decimated (645) to further reduce the sampling rate. The downconverted first and second phase signals, rather than higher frequency signals, control the gain function (AGC) for the amplifier (615). The switched capacitor network (610) provides for both tuning and downconversion of the desired signal to a lower frequency for further processing, thus reducing the frequency and power requirements of an associated amplifier and analog-to-digital converter (digitizer).

Abstract: A radio frequency (RF) antenna supporting and holding device. The antenna supporting and holding device is a molded dielectric substrate which may be used to hold, support, and position upper and lower RF antennas prior to attachment of the upper and lower RF antennas to underlying circuitry, such as a printed circuit board (PCB). The antenna supporting and holding device includes molded features for attachment to the PCB. After attachment of the upper and lower RF antennas to the antenna supporting and holding device, the device may be connected to the PCB independent of the attachment of the leads of the upper and lower RF antennas to the PCB. Thus, the antenna supporting and holding device allows the upper and lower RF antennas to be accurately positioned on the PCB prior to soldering the leads of the RF antennas to corresponding connection points on the PCB.