DESCRIPTION
1. Field of the Invention
The invention relates to communication network devices, and particularly to a network device with a communication slot for receiving a plurality of signals of different bands.
2. Description of Related Art
Conventional network devices usually can only perform one function. However, with the development of communications technology, a demand for network devices having multiple functions has grown, and single function network devices do not suffice.
A network device having multiple functions must be able to simultaneously process many different signals corresponding to different functions. Generally, the network device needs many communication slots and transmitting cables. Because there are many communication slots and transmitting cables, users must carefully plug the transmitting cables into the correct corresponding communication slots without mistake. This may cause inconvenience to users. In addition, the need for many communication slots increases a size of the network device.
Summary of Invention
One aspect of the present invention provides an exemplary network device for receiving a plurality of signals of different bands. The network device includes a communication slot, a first signal processing circuit, a second signal processing circuit, and a central processing unit. The communication slot is used for receiving the plurality of signals of different bands. The first signal processing circuit is connected to the communication slot, and is used for selecting a first band signal from the plurality of signals of different bands and processing the first band signal thereby generating a processed first band signal. The second signal processing circuit is connected to the communication slot, and is used for selecting a second band signal from the plurality of signals of different bands and processing the second band signal thereby generating a processed second band signal. The central processing unit is connected to the first and second signal processing circuits, and is used for processing the processed first and second band signals.
Another aspect of the present invention provides another exemplary network device for receiving a plurality of signals of different bands. The network device includes a communication slot, N signal processing circuits, and a central processing unit (CPU). The communication slot is used for receiving the plurality of signals of different bands. The N signal processing circuits are all connected to the communication slot, and are used for respectively selecting a total of N band signals from the plurality of signals of different bands, and respectively processing the N band signals thereby respectively generating a processed form of a total of N band signals. The CPU is connected to the N signal processing circuits, and is used for further processing the total of N processed band signals. N is a natural number.
Other advantages and novel features will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a block diagram of a network device for receiving a plurality of signals of different bands of a first exemplary embodiment of the present invention;
FIG. 2 is a block diagram of a network device for receiving a plurality of signals of different bands of a second exemplary embodiment of the present invention;
FIG. 3 is a block diagram of a network device for receiving a plurality of signals of different bands of a third exemplary embodiment of the present invention;
FIG. 4 is a circuit diagram of an asymmetrical digital subscriber loop filter circuit of the network device of FIG. 3; and
FIG. 5 is a block diagram of a network device for receiving a plurality of signals of different bands of a fourth exemplary embodiment of the present invention.
DETAILED DESCRIPTION
FIG. 1 is a block diagram of a network device 10 for receiving a plurality of signals of different bands of a first exemplary embodiment of the present invention. In the embodiment, the network device 10 includes a communication slot 100, a first signal processing circuit 300, a second signal processing circuit 400, and a central processing unit (CPU) 200. The communication slot 100 is used for receiving a plurality of signals of different bands. The first signal processing circuit 300 is connected to the communication slot 100, and is provided for selecting first band signals from the plurality of signals of different bands, and for processing the first band signals thereby generating processed first band signals. The second signal processing circuit 400 is also connected to the communication slot 100, and is provided for selecting second band signals from the plurality of signals of different bands, and for processing the second band signals thereby generating processed second band signals. The CPU 200 is connected to the first signal processing circuit 300 and the second signal processing circuit 400, and is used for processing the processed band signals. In the exemplary embodiment, the first and second band signals are analog signals, and the processed first and second band signals are digital signals. In the exemplary embodiment, impedance matching of the first signal processing circuit 300 and the second signal processing circuit 400 is the same.
The first signal processing circuit 300 includes a first filter circuit 310 and a first processing unit 320. The first filter circuit 310 is connected to the communication slot 100, and is provided for selecting the first band signals from the plurality of signals of different bands. The first processing unit 320 is disposed between the first filter circuit 310 and the CPU 200, and is used for processing the first band signals thereby generating the processed first band signals.
The second signal processing circuit 400 includes a second filter circuit 410 and a second processing unit 420. The second filter circuit 410 is connected to the communication slot 100, and is provided for selecting the second band signals from the plurality of signals of different bands. The second processing unit 420 is disposed between the second filter circuit 410 and the CPU 200, and is used for processing the second band signals thereby generating the processed second band signals.
FIG. 2 is a block diagram of a network device 10′ for receiving a plurality of signals of different bands of a second exemplary embodiment of the present invention. In this embodiment, a first signal processing circuit 300′ and a second signal processing circuit 400′ respectively include a first transformer 330 and a second transformer 430, and other parts of the network device 10′ of FIG. 2 are the same as those of the network device 10 of FIG. 1. The first transformer 330 is connected between the first filter circuit 310 and the first processing unit 320, and is used for transforming voltage levels of the first band signals. The second transformer 430 is connected between the second filter circuit 410 and the second processing unit 420, and is used for transforming voltage levels of the second band signals. In the exemplary embodiment, the first transformer 330 is used for raising voltage levels of the first band signals, and the second transformer 430 is used for raising voltage levels of the second band signals.
FIG. 3 is a block diagram of a network device 10″ for receiving a plurality of signals of different bands of a third exemplary embodiment of the present invention. In this embodiment, the network device 10″ includes the communication slot 100, a first signal processing circuit 300″, a second signal processing circuit 400″, and the CPU 200. Connections and functions of the network device 10″ are the same as those of FIGS. 1 and 2. In this embodiment, the first band signal is an asymmetrical digital subscriber loop (ADSL) signal, and the second band signal is a home phoneline networking alliance (HPNA) signal.
The first signal processing circuit 300″ includes an ADSL filter circuit 310′, an ADSL transformer 330′, and an ADSL processing unit 320′. The ADSL filter circuit 310′ is connected to the communication slot 100, and is used for selecting the ADSL signals from the plurality of signals of different bands. The ADSL transformer 330′ is connected between the ADSL filter circuit 310′ and the ADSL processing unit 320′, and is used for transforming voltage levels of the ADSL signals. The ADSL processing unit 320′ is connected to the ADSL transformer 330′ and the CPU 200, and is used for processing the ADSL signals thereby generating processed ADSL signals.
The second signal processing circuit 400″ includes an HPNA transformer 430′ and an HPNA processing unit 420′. The HPNA transformer 430′ is connected to the communication slot 100, and is used for selecting the HPNA signals from the plurality of signals of different bands, and for transforming voltage levels of the HPNA signals. In this embodiment, the HPNA transformer 430′ has a function of filtering, so the second signal processing circuit 400″ does not include a separate filter circuit. The HPNA processing unit 420′ is connected to the HPNA transformer 430′ and the CPU 200, and is used for processing the HPNA signals thereby generating processed HPNA signals.
FIG. 4 is a circuit diagram of the ADSL filter circuit 310′. In the exemplary embodiment, the ADSL filter circuit 310′ includes four inductors L1, L2, L3, and L4, and a capacitor C1. The inductor L1 is the same as the inductor L2, and the inductor L3 is the same as the inductor L4. The inductors L1 and L2 are both connected to the communication slot 100. The inductors L3 and L4 are respectively connected to the inductors L1 and L2, and are both connected to the ADSL transformer 330′. The capacitor C1 has one end thereof connected to the inductor L1 and the inductor L3, and the other end thereof connected to the inductor L2 and the inductor L4.
FIG. 5 is a block diagram of a network device 10′″ for receiving a plurality of signals of different bands of a fourth exemplary embodiment of the present invention. In this embodiment, the network device 10′″ includes the communication slot 100, N signal processing circuits 300, 400, . . . (N+2)00, and the CPU 200. N is a natural number. The communication slot 100 is used for receiving a plurality of signals of different bands. The N signal processing circuits 300, 400, . . . (N+2)00 are all connected to the communication slot 100, and are respectively used for respectively selecting a total of N band signals from the plurality of signals of different bands, and for respectively processing the N band signals thereby respectively generating a processed form of a total of N band signals. In the exemplary embodiment, the band signals are analog signals, and the processed band signals are digital signals. The CPU 200 is connected to the N signal processing circuits 300, 400, . . . (N+2)00, and is used for further processing the total of N processed band signals generated by the N signal processing circuits 300, 400, . . . (N+2)00. The first signal processing circuit 300 includes a first filter circuit 310 and a first processing unit 320, the second signal processing circuit 400 includes a second filter circuit 410 and a second processing unit 420, and so on through to the Nth signal processing circuit (N+2)00 includes an Nth filter circuit (N+2)10 and an Nth processing unit (N+2)20. Each of the filter circuits 310, 410, . . . (N+2)10 is used for selecting a corresponding band signal from the plurality of signals of different bands. Each of the processing units 320, 420, . . . (N+2)20 is connected to a corresponding filter circuit 310, 410, . . . (N+2)10, and is used for processing the corresponding band signal to generate the corresponding processed band signal. In the exemplary embodiment, impedance matching of the N signal processing circuits 300, 400, . . . (N+2)00 is the same.
The network devices 10,10′, 10″, and 10′″ can receive a plurality of signals with only the one communication slot 100. Therefore, the network devices 10, 10′, 10″, and 10′″ are convenient for users, and can help avoid operating mistakes.
While various embodiments have been described above, it should be understood that they have been presented by way of example only and not by way of limitation. Thus the breadth and scope of the present invention should not be limited by the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
Patent Application
20070066255
