Television receiver
First Claim
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1. A television receiver comprising:
- a tuner that receives a transmitted signal from an antenna;
a selective filter stage connected to said tuner;
an intermediate-frequency stage connected to said selective filter stage; and
at least one field-strength-detection stage that generates a field strength signal proportional to the field strength of said received signal, and which generates a control signal derived from said field strength signal, wherein said selective filter stage implements a transfer function that is modifiable by said control signal.
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Abstract
A television receiver includes a tuner stage, a selective filter stage connected to the tuner stage, and a intermediate-frequency stage connected to the selective filter stage. A field-strength-detection stage is also provided, which generates a field strength signal proportional to the field strength of the received signal. The selective filter stage includes a transfer function that is modifiable by a control signal derived from the field strength signal.
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Citations
24 Claims
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1. A television receiver comprising:
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a tuner that receives a transmitted signal from an antenna;
a selective filter stage connected to said tuner;
an intermediate-frequency stage connected to said selective filter stage; and
at least one field-strength-detection stage that generates a field strength signal proportional to the field strength of said received signal, and which generates a control signal derived from said field strength signal, wherein said selective filter stage implements a transfer function that is modifiable by said control signal. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 13)
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4. The television receiver of claim 4, wherein one chrominance signal and one luminance signal are contained in the received signal,
and wherein said frequency trap is dimensioned such that, in response to a higher field strength signal, spectral components of the chrominance signal are more strongly suppressed, while in response to a lower field strength signal noise signals in the spectral range of luminance and chrominance signal are reduced.
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11. A television receiver comprising:
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a tuner that receives a transmitted signal from an antenna;
a first selective filter stage connected to said tuner, said selective filter stage implementing a transfer function that is modifiable by one or more control signals derived from a field strength signal; and
an intermediate-frequency stage connected to said selective filter stage and generating a first control signal of said one or more control signals. - View Dependent Claims (12, 14, 15, 16, 17, 18, 19)
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20. A television receiver comprising:
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a tuner that receives a transmitted signal from an antenna;
first selective filter means, connected to said tuner, for implementing a transfer function modifiable in response to one or more control signals; and
means for generating said control signal derived from a detected field strength of the received signal. - View Dependent Claims (21, 22, 23)
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Specification