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US 2009/0156155 A1Published application
Receiver, tuner and method of processing a television signal
AssigneeInfineon Technologies AG
InventorsErwin Krug, Claus Muschallik, Lars Persson
Life of this patent
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Abstract
The invention is related to a receiver and a tuner respectively, particularly to a television receiver or tuner which can be integrated in a single circuit device. The invention is also related to a method for processing RF signal.
Claims25
A receiver, comprising:
- a receiver input configured to receive an RF signal;
- a first mixer device coupled to the receiver input and configured to convert the RF signal to a first intermediate signal at a first operating frequency;
- a second mixer device coupled to the first mixer and configured to convert the first intermediate signal to a second intermediate signal at a second operating frequency;
- wherein at least one of the first mixer device and the second mixer device comprises a harmonic rejection mixer.
1 more element
A television tuner, comprising:
- a low noise amplifier configured to amplify a received signal applied to an input terminal;
- an up-down frequency converter connected to the low noise amplifier and configured to convert the amplified received signal to a baseband signal, wherein the up-down frequency converter comprises a first mixer stage configured to up-convert the amplified received signal and a second mixer stage to down-convert the up-converted signal, wherein at least one of the first and second mixer stages comprises a harmonic rejection mixer configured to suppress harmonic portions in a local oscillator signal applied thereto.
An integrated tuner configured to receive an RF signal, comprising:
- an input device configured to receive and amplify an RF signal;
- a first frequency conversion means coupled to the input device, and configured to convert the amplified RF signal to an intermediate signal at a first intermediate frequency;
- and
- a second frequency conversion means configured to convert the intermediate signal to a baseband signal at a second intermediate frequency;
- wherein at least one frequency conversion means of the first and the second frequency conversion means are configured to suppress harmonic portions with respect to a basic frequency in a signal applied thereto.
2 more elements
A method of processing a television signal, comprising:
- receiving the television signal;
- providing a first local oscillator signal with an adjustable frequency;
- up-converting the received television signal to a first intermediate signal at a first intermediate frequency;
- filtering the first intermediate signal to suppress undesired signals portions generated during up-conversion;
- down-converting the first intermediate signal to a second intermediate signal at a second intermediate frequency;
- and
- suppressing harmonic signal portions during converting to at least one signal of the first and second intermediate signals.
4 more elements
Dependencies are inferred from the claim text.