Broadband integrated tuner
First Claim
Patent Images
1. A receiver comprising:
- 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;
a third amplifier in communication with said second filter; and
a coherent oscillator circuit in communication with an output of said second amplifier, wherein said coherent oscillator circuit is located on said single integrated circuit substrate.
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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.
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Citations
1 Claim
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1. 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; a third amplifier in communication with said second filter; and a coherent oscillator circuit in communication with an output of said second amplifier, wherein said coherent oscillator circuit is located on said single integrated circuit substrate.
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Specification