High frequency tuner
View Patent ↗A tuner for receiving a satellite broadcast signal via an antenna means, said tuner being coupled to a control unit. The tuner is characterized in that it comprises a standard bilateral digital interface for transmitting a base-band signal obtained from the received signal received via the antenna means and for receiving control signals transmitted by the control unit, said signals being transmitted/received via a first bilateral bus.
1. A tuner for receiving a satellite broadcast signal via an antenna means, said tuner being coupled to a control unit, the tuner comprising:
a standard bilateral digital interface for transmitting to the control unit a base-band signal obtained from the signal received via the antenna means and for receiving from the control unit control signals transmitted by the control unit, and
a first bilateral digital bus coupled between the standard bilateral digital interface and the control unit to communicate the signals between the bilateral digital interface and the control unit, wherein the tuner is remotely located from the control unit,
wherein the tuner further comprises a zero IF receiver.
2. A tuner as claimed in claim 1 wherein the signals through the first bilateral bus are compatible to either IEEE 1394 or USB standards.
3. A tuner as claimed in claim 1 wherein the first bilateral bus is adapted to transfer signals compatible to a wireless communications standard.
4. A tuner as claimed in claim 1 comprising a channel decoder for performing a channel decoding operation, the standard digital interface being adapted to transform a signal obtained after the channel decoding operation into a signal compatible to the first bilateral bus.
5. A tuner as claimed in claim 4 wherein the channel decoder comprises a pair of input terminals for receiving a first signal generated by a first analog to digital converter and a second signal generated by a second analog to digital converter said analog to digital converters performing a conversion of zero IF quadrature signals into digital signals to be decoded by the channel decoder.
6. A tuner as claimed in claim 5 wherein the quadrature signals inputted to the analog to digital converters are generated by a mixer, said mixer combining an input signal having a frequency substantially equal to the input signal with a quadrature periodical signal generated by a local oscillator, the periodical signal having a frequency substantially equal to the frequency of the input signal.
7. A tuner as claimed in claim 6 comprising a first controllable buffer and a second controllable buffer for selecting between an input signal being horizontally polarized and an input signal being vertically polarized, respectively.
8. A tuner as claimed in claim 7 wherein the first buffer and the second buffer are controlled by a binary signal.
9. A tuner as claimed in claim 8 comprising a band-pass filter coupled to the first buffer and to the second buffer for selecting an input signal situated in a frequency range.
10. A tuner as claimed in claim 1 wherein the antenna means comprises an energy converter for supplying the tuner.
11. A tuner as claimed in claim 1 the tuner being integrated in a single chip.
12. A receiving system comprising a tuner as claimed in claim 1 , said receiving system comprising the control unit, the control unit being coupled to the tuner via the first bus, the control unit comprising a second standard interface coupled to the first bus for receiving the signal transmitted by the tuner, said control unit further comprising a source decoder for decoding the signal received via the first bus and transmitting decoded signals to the peripherals via the second bus.
13. A receiving system as claim in claim 12 wherein the source decoder is a MPEG decoder.
14. A receiving system as claimed in claim 12 wherein the control unit is a set-top-box.
15. A receiving system as claimed in claim 12 wherein the control unit is a personal computer.
16. A receiving system as claimed in claim 12 wherein the control unit is further coupled to a plurality of peripherals via a second bilateral bus.
17. A receiving system as claimed in claim 13 wherein the second bilateral bus is adapted to transmit and receive signals compatible to either IEEE 1394 or USB standards.
18. A receiving system as claimed in claim 12 wherein the second bilateral bus is adapted to transfer signals compatible to a wireless communications standard.