KR960000143B1 - Satelite receiver having radio receiver - Google Patents

Abstract

The device comprises the first signal input unit which inputs satellite signals, the second signal input unit which input radio signals, the first switch which inputs the satellite and the radio signals and outputs them selectively, the first voice signal detecting unit which detects FM voice signals from selective output signals of the first switch, the second voice signals detecting unit which detects AM voice signals from the output signals of the second signals input unit, and the second switch which inputs FM and AM signals from the voice signal detecting unit and outputs selectively.

Description

Satellite broadcasting receiver with radio signal reception

1 is a satellite broadcasting receiving apparatus having a radio signal receiving function according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

2: IF switch 3: Radio signal input terminal

5,6,13: Mixer 7,8,15: Voltage controlled oscillator

9,11,16 IF filter 10,12,17 Detector

14: radio band pass filter 18,19: sound signal detector

20: first switch 21: volume control unit

25: satellite bandpass filter

The present invention relates to a satellite broadcasting receiver having a radio signal receiving function.

Satellite broadcasting transmits radio waves to broadcast satellites floating in space from the earth's broadcasting stations and configures the receivers to receive radio waves directly from satellites. Currently used satellite broadcasting receivers provide the advantage that the receivers of the astigmatism area can receive broadcast waves. However, since the satellite broadcast receiver currently used does not have a radio signal reception function, it is inconvenient to purchase a separate device for receiving a radio signal to a user who wants to listen to the radio at a time when the satellite is not broadcast or at night.

An object of the present invention for solving the above problems is to add a circuit for receiving a radio signal and a selection means for selecting satellite broadcast reception and radio broadcast reception to a conventional satellite broadcast receiver to reduce the equipment purchase cost of the user It is to provide a satellite broadcasting receiver with a radio signal receiving function that can increase the utilization of the equipment.

As described above, an object of the present invention is to provide an electronic apparatus for receiving satellite broadcasting, comprising: a first signal input terminal for receiving satellite band signals, a second signal input terminal for receiving radio band signals, and a satellite for outputting from the signal input terminals; A first switch for receiving and selectively outputting a band signal and a radio band signal, a first sound signal detecting means for receiving an output signal from the first switch and detecting an FM sound signal, and an output signal from the second signal input terminal; And a second sound signal detecting means for receiving an AM sound signal, and a second switch for receiving and outputting an FM sound signal and an AM sound signal from the sound signal detecting means. It is achieved by a satellite broadcasting receiver equipped with.

Aha, a preferred embodiment of implementing the satellite broadcasting receiver of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a satellite broadcasting receiver having a satellite broadcasting receiving function having a radio signal receiving function according to an embodiment of the present invention.

The apparatus of FIG. 1 includes a buffer 24 connected to a satellite antenna 22 for receiving satellite broadcasts and a signal output terminal of a tuner 23 for converting and demodulating an input signal, and a signal output terminal of the buffer. A satellite band pass filter (SBPF) connected to the video signal detector 26 for outputting a video signal and to an output terminal of the buffer 24 and passing only a signal between 5.0 and 8.5 MHz in the satellite broadcast signal. (25), a radio band pass filter (RBPF) 14 for receiving and filtering a radio signal input stage 3 and a radio signal, and an output signal from the radio band pass filter 14 and the satellite band pass filter 25; Receives an IF switch () for selective output, a first sound signal detector (18) for outputting a stereo sound signal for processing a second switch signal, and an output signal from the band pass filter (14) to detect a radio signal And a second sound signal detector 19 for outputting sound, The first switch 20 that receives the output signal of the signal detectors 18 and 19 and selectively outputs the output signal of the first switch 20 and the output sound signal of the first switch 20 to adjust the volume to adjust the volume for each R and L section of the stereo. It includes a volume control unit 21 for outputting.

The image signal detection unit 26 includes a de-emphasis 27 connected to an output terminal of the buffer 24, an amplifier 28 connected to an output terminal of the deamplification 27, and an amplifier 28. Low pass filter (LPF) 29 connected to the output terminal of < RTI ID = 0.0 >), < / RTI > the output signal of buffer 24 and the output signal of amplifier 28 and the output of low pass filter (LPF) 29 and buffer 24 The second switch 30 receives and outputs a signal, an output signal of the amplifier 28 and an output signal of the low pass filter 29.

The first sound signal output unit 18 includes a first voltage controlled oscillator (VCO) 7 and a second voltage controlled oscillator for changing an oscillation frequency within a satellite signal band and an FM signal band according to an externally applied voltage. (8) and 10.7 from the output signal of the first mixer 5 and the first mixer 5 for mixing and outputting the output signal of the first voltage controlled oscillator 7 and the predetermined output signal of the IF switch 21. A first IF filter 9 for detecting an intermediate frequency of MHzwjd degrees, a first detector 9 for detecting an acoustic signal from an output signal of the first IF filter, and a first detector for detecting an acoustic signal from an output signal of the first IF filter (10), the second mixer 6 for mixing and outputting the output signal of the second voltage controlled turbine 8 and the other predetermined output signal of the IF switch 21, and the output signal of the second mixer 6; A second IF filter 11 for detecting an intermediate frequency of about 10.7 MHz from the second signal; and an audio signal for detecting an acoustic signal from an output signal of the second IF filter. Two detectors 12 are provided.

The second sound signal detector 19 receives a third voltage controlled oscillator 15 for changing the oscillation frequency within the AM signal band according to the applied voltage, and a radio signal output from the radio band pass filter 14 to receive a third voltage. A third mixer 13 which is mixed with the signal output from the control oscillator 15 and output, a third IF filter 11 which detects an acoustic signal from the output signal of the third mixer 13, and an IF filter 11; And a third detector 12 which detects an AM signal from the output signal and applies it to the first switch 20.

In addition, the apparatus of FIG. 1 includes a microcomputer 1 for controlling the oscillation frequency of the voltage controlled oscillators 7, 8, 15, and the operation of the volume controller 21 and the switches 20, 21, 30.

When the user selects the radio signal reception mode in the satellite broadcasting time zone, the microcomputer 1 generates a selection signal applied to the IF switch 2 and passes through the radio signal input stage 3 and the band pass filter (RBPF) 4. The signal input to the FI switch 2 is input to the first mixer 5 and the second mixer 6. Then, the first voltage controlled oscillator 7 and the second voltage controlled oscillator 8 are controlled to generate a predetermined frequency between 70 and 110 MHz, which is an oscillation frequency band of the radio FM signal. The first mixer 5 mixes and outputs an output frequency of the first voltage controlled oscillator 7 and a frequency of a signal output through a predetermined output terminal of the IF switch 2. The first IF filter 9 receives the output signal of the first mixer 5 and passes only signals having an intermediate frequency of 10.7 MHz corresponding to the difference between the oscillation frequency and the FM frequency. The first detector 10 receives the filtered signal and detects an R sense of the stereo sound signal. The second mixer 6 mixes the output frequency of the second voltage controlled oscillator 8 with the frequency of the signal output through the other predetermined output terminal of the IF switch 2. The second IF filter 11 receives the output signal of the second mixer 6 and passes only signals in the intermediate frequency band of 10.7 MHz. The second detector 12 detects the L sense of the stereo sound signal from the output signal of the second IF filter 11.

The output signal of the radio band pass filter 14, which is input to the third mixer 13, is generated in the AM radio signal band generated by the third voltage controlled oscillator 15 that determines the generation frequency according to the control of the microcomputer 1; The output is mixed with a predetermined oscillation frequency.

The third IF filter 16 passes only the intermediate frequency band from the input signal. The third detector 17 detects an AM sound signal from the output signal of the third IF filter 16.

The FM sound signal of the R and L sections detected by the first sound signal detector 18 and the AM sound signal detected by the second sound signal detector 19 are first switched by the microcomputer 1. The AM / FM mode and the mono / stereo mode are selected according to the generated control signal and the input sound signal is output according to the selected mode.

The volume adjusting unit 21 receives the control signal of the microcomputer 1 and adjusts the volume of the sound signal output from the first switch 20.

When the user selects the satellite broadcasting reception mode, the microcomputer 1 applies the selection signal to the IF switch 2 to convert the satellite broadcasting signal input from the satellite antenna 22 through the satellite band pass filter 25 to the IF switch ( 21) to control the output.

The satellite broadcasting signal output from the IF switch and having a carrier frequency of 5.0 to 8.5 MHz is mixed with the output frequency of the voltage controlled oscillator 7, 8 having an oscillation frequency of 15, 0 to 20 MHz by the mixer 5.6. The first IF filter 9 and the second IF filter 11 filter only the signals output from the first mixer 5 and the second mixer 6 connected to the respective signal input terminals, and only have a signal having a carrier frequency of about 10.7 MHz. Pass it through. The first detector 10 and the second detector 12 detect and output an acoustic signal from the input signal. The first switch 20 outputs the input sound signal, that is, the sound signal obtained from the satellite broadcast signal, as one of mono / stereo according to the control signal of the microcomputer 1. The volume controller 21 outputs a sound signal whose volume is adjusted according to the control signal of the microcomputer 1.

The general operation of the image signal detector 26 in the satellite broadcasting reception mode is as follows.

The deamplifier 27 outputs the high frequency drop of the signal output through the tuner 23 and the buffer 24, and the amplifier 28 and the low pass filter 29 amplify and filter the input signal and output the same. When the video signal obtained by the amplifier 28 and the low pass filter 29 and the output signal of the buffer 24 are input to the second switch 30, the second switch 30 inputs the input signals to the microcomputer 1 or the like. Output under the control of.

The satellite broadcasting receiver having a radio signal receiving function of the present invention as described above includes a voltage controlled oscillator having a conventional oscillation frequency band extended to a satellite broadcasting signal and an FM radio signal band, and a tuner unit capable of receiving AM radio signals. Also, by additionally configuring a switch for selecting and outputting a satellite broadcasting signal and an FM radio signal and a switch for determining an AM / FM mode to the conventional satellite broadcasting receiver, the user can reduce the equipment purchase cost and improve the utilization of the existing equipment. It can be effected.

Claims (2)

An electronic device for receiving satellite broadcast signals, comprising: a first signal input terminal for receiving a satellite band signal; A second signal input terminal for receiving a radio band signal; A first switch which receives and outputs a satellite band 9 signal and a radio band signal outputted from the signal input terminals; First sound signal detection means for receiving a selection output signal from the first switch and detecting an FM sound signal; Second sound signal detection means for receiving an output signal from the second signal input and detecting an AM sound signal; And a second switch configured to receive and selectively output the FM sound signal and the AM sound signal from the sound signal detection means. 2. The satellite broadcast reception with a radio signal reception function according to claim 1, wherein the first sound signal detection means comprises a voltage controlled oscillator for generating an oscillation frequency corresponding to an acoustic signal of satellite broadcasting and FM radio band. Device.