CN2909730Y - Signal selection and output controlled integral circuit and TV. set - Google Patents
Signal selection and output controlled integral circuit and TV. set Download PDFInfo
- Publication number
- CN2909730Y CN2909730Y CN 200620084833 CN200620084833U CN2909730Y CN 2909730 Y CN2909730 Y CN 2909730Y CN 200620084833 CN200620084833 CN 200620084833 CN 200620084833 U CN200620084833 U CN 200620084833U CN 2909730 Y CN2909730 Y CN 2909730Y
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Abstract
The utility model discloses a circuit and a television integrating signal selection with output control, comprising a CPU and two signal sources. Each signal source is correspondingly connected to one channel of one circuit of the two-circuit 4-channel analog switch chip; the selected address input terminal of the two-circuit 4-channel analog switch chip is connected with the selection control signal outputted by the CPU; the enable terminal of the two-circuit 4-channel analog switch chip is connected with the switch control signal outputted by the CPU; the output terminal of the two-circuit 4-channel analog switch chip is connected with a subsequent control circuit. The utility model realizes the switchover output of the sound sources through selecting addresses and realizes the on-off action of the sound source output according to the high and low level states of the switch control signals. Thereby, the utility model realizes the switchover of the signals and the switch control of the output simultaneously with only one chip, which significantly simplifies the way of control and communication of the circuit, saves the cost of the circuit and makes the system operation more stable and reliable.
Description
Technical field
The utility model belongs to the TV set circuit technical field, specifically, relates to a kind of integrated circuit that is applied to finish in the TV set circuit selection of optical fiber voice output and the switch control that output has or not.
Background technology
In existing TV set circuit design, the independent switching chip of general employing multiselect one is finished the selection output of signal, using an other control chip to finish under different conditions to signal output has or not and carries out switch control, different conditions such as for example start, standby, shutdown.Adopt sort circuit structure complex circuit, cost height, to take the pcb board area big, is unfavorable for the miniaturization Design of equipment.
Summary of the invention
Selection and the control to signal needs the cooperation of two chips to realize the high problem of being brought of complex structure, cost to the utility model in the prior art in order to solve, provide a kind of novel TV machine to select control circuit, adopt a chips to finish the switch that output is selected and output the has or not control of signal simultaneously, simplify circuit structure and Communication Control, effectively saved cost.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of signal is selected and output is controlled integrated circuit and television set comprise CPU and multipath signal source, and each road input switches the corresponding one to one connection of each road input of chip respectively in the described multipath signal source with a multichannel; The selection address input end that multichannel is switched chip links to each other with the selection control signal of described CPU output, and its Enable Pin connects the switch controlling signal of described CPU output; The output that described multichannel is switched chip connects follow-up treatment circuit.
As further qualification to technique scheme, it is that a model is the multichannel 4 tunnels analogy switch chips of 74HC4052 that described multichannel is switched chip, signal source is the two paths of signals of optical fiber voice output, respectively with two-way 4 tunnels analogy switch chips in wherein 1 corresponding connection of passage of two-way; All the other 3 passages on each road are respectively with receiving terminal, the transmitting terminal of CPU with the remote signal end is corresponding is connected in the described multichannel 4 tunnels analogy switch chips.The audio signal output terminal of described two-way 4 tunnels analogy switch chips connects follow-up audio frequency processing circuit, and all the other 3 control signal output ends connect motherboard circuit.
Compared with prior art, advantage of the present utility model and good effect are: the utility model only adopts a chips just to finish the switching of signal and the control of switch that output has or not simultaneously, thereby effectively simplified circuit control and communication modes, made system works more stable, more reliable.The most important thing is and to finish the function that common needs two chips just can be finished with a chips, saved circuit cost greatly, simplified circuit structure, help the miniaturization Design of system, improved the market competitiveness of tv product.
Description of drawings
Fig. 1 is that signal is selected and the schematic diagram of output control circuit in the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
The utility model specifically is applied in the selection of optical fiber and digital voice signal is switched and output control aspect, and its physical circuit schematic diagram is referring to shown in Figure 1.
Among Fig. 1, the optical fiber voice output has two signal sources: HDMI_SPDIF and LX_SPDIF, being connected to model respectively is two input pin2 (1A) and the pin3 (1B) of the two-way 4 tunnels analogy switch chip U29 of 74HC4052.The selection control signal SPDIF_SW that is sent by system CPU is connected to the selection address input pin pin1 (A-/B) of analog switch chip U29, the optical fiber sound of decision output is HDMI_SPDIF or LX_SPDIF, connects follow-up audio frequency processing circuit through resistance R 275.The received signal LX_UART_RXD_J end of CPU connects input pin5 (2A) and the pin6 (2B) of simulation switch chip U29; The transmission signal LX_UART_TXD_J end of CPU connects input pin11 (3A) and the pin10 (3B) of simulation switch chip U29; The remote signal INFRARED_J that remote controller sends is connected to input pin14 (4A) and the pin13 (4B) of analog switch chip U29, and is connected to motherboard circuit by resistance R 283, R280, R279 respectively through its output end p in7 (2Y), pin9 (3Y) and pin12 (4Y).
Simultaneously, the switching signal SWITCH that has or not of voice output is connected to the Enable Pin pin15 (G-) of analog switch chip U29.When entering state such as standby, dormancy at television set, this switching signal SWITCH is a high level, with the output shielding of analog switch chip U29, makes its signal output invalid, and then has blocked the output of voice signal and control signal.Need under the state of optical fiber output signal at other, the SWITCH signal is a low level, and the signal of analog switch chip U29 is output as effective model, thereby has realized the selection output of voice signal and normally passing through of control signal.
The utility model adopts above-mentioned simple circuit configuration only can finish the switch control that signal switches and output has or not simultaneously with a chips, has effectively saved circuit cost, has simplified Communication Control.Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (8)
1. the integrated circuit of control is selected and exported to a signal, comprises CPU and multipath signal source, it is characterized in that: each road input switches the corresponding one to one connection of each road input of chip respectively in the described multipath signal source with a multichannel; The selection address input end that multichannel is switched chip links to each other with the selection control signal of described CPU output, and its Enable Pin connects the switch controlling signal of described CPU output; The output that described multichannel is switched chip connects follow-up treatment circuit.
2. the integrated circuit that signal according to claim 1 is selected and output is controlled, it is characterized in that: it is a multichannel 4 tunnels analogy switch chips that described multichannel is switched chip, in the multipath signal source each road input respectively with wherein one tunnel the corresponding connection of 1 input channel of described multichannel 4 tunnels analogy switch chips, 3 passages of all the other of each road are respectively with receiving terminal, the transmitting terminal of CPU with the remote signal end is corresponding is connected.
3. signal according to claim 2 is selected and the integrated circuit of output control, and it is characterized in that: described signal source is the two paths of signals of optical fiber voice output, respectively with the corresponding connection of two input channels of two-way 4 tunnels analogy switch chips; Its audio signal output terminal connects follow-up audio frequency processing circuit, and its excess-three control signal output ends connects motherboard circuit.
4. the integrated circuit that signal according to claim 3 is selected and output is controlled, it is characterized in that: the model of described two-way 4 tunnels analogy switch chips is 74HC4052.
5. one kind has the television set that the integrated circuit of control was selected and exported to the described signal of claim 1, comprise CPU and multipath signal source, it is characterized in that: each road input switches the corresponding one to one connection of each road input of chip respectively in the described multipath signal source with a multichannel; The selection address input end that multichannel is switched chip links to each other with the selection control signal of described CPU output, and its Enable Pin connects the switch controlling signal of described CPU output; The output that described multichannel is switched chip connects follow-up treatment circuit.
6. television set according to claim 5, it is characterized in that: it is a multichannel 4 tunnels analogy switch chips that described multichannel is switched chip, in the multipath signal source each road input respectively with wherein one tunnel the corresponding connection of 1 input channel of described multichannel 4 tunnels analogy switch chips, 3 passages of all the other of each road are respectively with receiving terminal, the transmitting terminal of CPU with the remote signal end is corresponding is connected.
7. television set according to claim 6 is characterized in that: described signal source is the two paths of signals of optical fiber voice output, respectively with the corresponding connection of two input channels of two-way 4 tunnels analogy switch chips; Its audio signal output terminal connects follow-up audio frequency processing circuit, and its excess-three control signal output ends connects motherboard circuit.
8. television set according to claim 7 is characterized in that: the model of described two-way 4 tunnels analogy switch chips is 74HC4052.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620084833 CN2909730Y (en) | 2006-05-23 | 2006-05-23 | Signal selection and output controlled integral circuit and TV. set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620084833 CN2909730Y (en) | 2006-05-23 | 2006-05-23 | Signal selection and output controlled integral circuit and TV. set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2909730Y true CN2909730Y (en) | 2007-06-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620084833 Expired - Fee Related CN2909730Y (en) | 2006-05-23 | 2006-05-23 | Signal selection and output controlled integral circuit and TV. set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2909730Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101282443B (en) * | 2007-04-05 | 2010-09-29 | 青岛海信电器股份有限公司 | Automatic strobe circuit for multipath signal source interface |
-
2006
- 2006-05-23 CN CN 200620084833 patent/CN2909730Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101282443B (en) * | 2007-04-05 | 2010-09-29 | 青岛海信电器股份有限公司 | Automatic strobe circuit for multipath signal source interface |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070606 Termination date: 20110523 |