TUNER
First Claim
1. A tuner comprising:
- an amplifier configured to amplify a radio frequency (RF) signal received by the tuner;
a tunable filter configured to filter an output signal of the amplifier by varying filter characteristics of the tunable filter in response to a channel control signal, the filter characteristics of the tunable filter including filter type characteristics of the tunable filter; and
a mixer configured to generate In-phase and Quadrature IF signals by mixing an output signal of the tunable filter and a local oscillator signal.
1 Assignment
0 Petitions
Accused Products
Abstract
The present disclosure relates to a tuner capable of receiving a television broadcasting signal of a wide band having an operating frequency bandwidth of 48 MHz˜1 GHz, wherein the tuner filters a radio frequency (RF) signal outputted from the low noise amplifier using a tunable filter. The tunable filter includes according to an embodiment an inductor and a variable capacitor as passive elements to reject harmonics. The tuner includes a mixer which mixes an output signal of the tunable filter with a local oscillator signal and converts the mixed signal to an In-phase and Quadrature IF signal, where the converted IF signal of I channel and Q channel is processed through an IF signal processor and is converted to an appropriate signal by a demodulator.
-
Citations
20 Claims
-
1. A tuner comprising:
-
an amplifier configured to amplify a radio frequency (RF) signal received by the tuner; a tunable filter configured to filter an output signal of the amplifier by varying filter characteristics of the tunable filter in response to a channel control signal, the filter characteristics of the tunable filter including filter type characteristics of the tunable filter; and a mixer configured to generate In-phase and Quadrature IF signals by mixing an output signal of the tunable filter and a local oscillator signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A method for processing an RF signal using a tuner including an antenna and a tunable filter, the method comprising:
-
amplifying the RF signal received through the antenna; varying filter characteristics of the tunable filter in response to a channel control signal, the filter characteristics of the tunable filter including filter type characteristics of the tunable filter; selectively filtering the amplified R-F signal through the tunable filter having the varied filter characteristics; and generating In-phase and Quadrature IF signals by mixing an output signal of the tunable filter and a local oscillator signal.
-
-
19. A tuner comprising:
-
a tunable filter configured to filter a RF signal according to a channel control signal, the tunable filter including an impedance converter for receiving the RF signal and a filter core coupled to the filter core, wherein the impedance converter is selectively operated according to the channel control signal so as to vary filter characteristics of the tunable filter for filtering the RF signal; and a mixer configured to mix an output signal of the tunable filter and a local oscillator signal. - View Dependent Claims (20)
-
Specification