Resources Contact Us Home
Tuner for reception of a broadband radio frequency signal

Image Number 3 for United States Patent #7236760.

A tuner is provided for selecting a channel from a broadband radio frequency input signal containing a plurality of channels, such as a terrestrial broadcast signal. The tuner has an input which supplies the broadband signal to a filter. The output of the filter is connected to a mixer of a single frequency changer, which converts the selected channel to a predetermined non-zero intermediate frequency. The filter is a tracking radio frequency filter which tracks the frequency of the selected channel so as to attenuate the image channel. A controller receives from a demodulator a signal representing reception quality, such as bit error rate, and adjusts the tracking of the filter so as to achieve acceptable reception quality, such as an adequately low bit error rate. Alignment of the filter during manufacture is not, therefore, required.

  Recently Added Patents
Block polymers and their process of preparation
Image erasing apparatus and recording medium conveying method for image erasing apparatus
Electrical event detection device and method of detecting and classifying electrical power usage
Secure mobile ad hoc network
System for wireless local area network (WLAN) transmission and for coexistence of WLAN and another type of wireless transmission and methods thereof
System and method for providing advertising content using a group training system
Proximity sensor arrangement in a mobile device
  Randomly Featured Patents
Printer housing
Encoding, clock recovery, and data bit sampling system, apparatus, and method
Computer generated image for a display panel or screen
Internal filter
Control device for automobile electric equipments
Printing structure of medium surface on which dot pattern is formed by printing, printing method, and its reading method
Peelable menstrual pad
Insulation-coated conductive particle
Thermally developable photosensitive compositions containing acutance agents