BROADBAND INTEGRATED TUNER
6 Assignments
0 Petitions
Accused Products
Abstract
A broadband integrated receiver for receiving input signals and outputting composite video and audio signals is disclosed. The receiver employs an up-conversion mixer and a down-conversion mixer in series to produce an intermediate signal. An intermediate filter between the mixers performs coarse channel selection. The down-conversion mixer may be an image rejection mixer to provide additional filtering.
45 Citations
85 Claims
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1-71. -71. (canceled)
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72. A receiver comprising:
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a first amplifier receiving RF signals, wherein said first amplifier is a low-noise amplifier; a first mixer having a first input coupled to said first amplifier and a second input coupled to a first reference signal having a first operating frequency, wherein said first mixer is in communication with a first filter; a second mixer having a first input coupled to an output of said first filter and a second input coupled to a second reference signal having a second operating frequency, wherein said second mixer is in communication with a second amplifier; a second filter having an input coupled to an output of said second amplifier; and a third amplifier in communication with said second filter;
wherein the second filter is external to a single integrated circuit substrate on which at least said first amplifier and said first and second mixers are located. - View Dependent Claims (73, 74, 75, 76)
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77. A television receiver comprising:
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a first amplifier receiving RF signals, wherein said first amplifier is a low-noise amplifier; a first mixer having a first input coupled to said first amplifier and a second input coupled to a first reference signal having a first operating frequency, wherein said first mixer is in communication with a first filter; a second mixer having a first input coupled to an output of said first filter and a second input coupled to a second reference signal having a second operating frequency, wherein said second mixer is in communication with a second filter; a second amplifier receiving an output signal from said second filter, wherein said second amplifier is an automatic gain control amplifier; and a coherent oscillator circuit having an input coupled to said second amplifier and an output coupled to an automatic gain control circuit in communication with a video detector, wherein said automatic gain control circuit is capable of controlling a gain of said television receiver by adjusting gains of said first and second amplifiers. - View Dependent Claims (78, 79, 80, 81)
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82. A receiver comprising:
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a receiver input coupled to an RF signal source; a first reference signal having a first operating frequency; a first mixer having a first input coupled to said receiver input and a second input coupled to said first reference signal; a second mixer having a first input coupled to an output of said first mixer and a second input coupled to a second reference signal having a second operating frequency, wherein a first and a second phase locked loop provide reference signal inputs for a third phase locked loop to produce said second reference signal; and a frequency synthesizer for generating reference frequency inputs to said first and second phase locked loops, wherein loop bandwidths of said first and second phase locked loops are independent of a step size of said frequency synthesizer. - View Dependent Claims (83, 84, 85)
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Specification