JPS6026324B2 - Device for checking operation of writing tuning data into memory in receiver tuning device - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a method for writing data such as reception channel presets into a memory disposed in a channel selection device of a receiver for television broadcasting, radio broadcasting, etc. The purpose is to make it easy to visually or aurally check whether or not the operations are actually being performed correctly in a predetermined sequence, or whether the operations have not been memorized due to an error during operation. It was developed.

More specifically, although the writing operation time is extremely short at several tens of milliseconds, it is extended to 2 to 3 seconds for display purposes, etc., so that it can be confirmed visually. . For example, as a channel selection device for a television receiver, there is a synthesizer type electronic channel selection device equipped with a semiconductor type memory M as shown in FIG.

To roughly explain the synthesizer type electronic tuning device using a phase-locked loop (PLL) shown in Fig. 1, 1 is an antenna, 2 is a tuner placed after this antenna, and 3 is placed after this tuner. prescaler, 5,5
Reference numeral a denotes a phase-locked loop section arranged after the prescaler, 6 a low-pass filter forming this phase-locked loop section, and the latter stage of the filter is connected to the tuner 2.

COM is a microcomputer disposed downstream of the phase lock loop section 5, 11 is a keyboard connected to this computer, and 12 is a display section disposed on this computer.

Reference numeral 13 designates a mode input device for specifying whether the channel selection operation is to be performed with one touch, that is, with one key touch, or with two key touches.

14 is a key preset device, and this key preset device is
A command to store the reception channel in one key and a command to write the data of this reception channel into the memory M are output, respectively.

The electronic channel selection device as described above can select a receivable channel by operating two keys on the keyboard 11, for example, by switching the mode input device 13 to two key input operations. For example, "6". When the user presses the two keys "2", the 62nd channel is selected. On the other hand, the mode input device 13 is set to a two-key input mode, the key memory switch of the key preset device 14 is turned on, and a desired key on the keyboard 11, for example, "2" is pressed.

Next, turn on the channel setting switch of the key preset device 14, and press the predetermined key of the keyboard 11.
For example, when the receiving channel is the 62nd channel,
When you press the two keys "6" and "2", the memory M key "
The 62nd channel, which is the receiving channel, is added to the address corresponding to "2".
Channel selection data is written. As a result, if the mode input device 13 is set to the one-touch operation mode, for example, when the key "2" on the keyboard 11 is pressed,
Tuning data corresponding to the 62nd channel is read from the memory M and set in the PLL frequency synthesizer system, so that the 62nd channel is automatically tuned and received.

The present invention relates to an improvement of a channel selection device equipped with a semiconductor memory M as described above, and an embodiment will be explained based on FIG. 2. It is a controller for the memory connected to the .

This controller is a microcomputer (COM)
When a write command M is input from , a write/read pulse p is output to the memory M. As a result, the write data W from the microcomputer (COM)
D is written to a predetermined location in memory M. When a read command rd is input from the microcomputer (COM), a pulse P is output to the memory M, and read data (RD) is read from a predetermined location in the memory M. This is a transistor for increasing QI', and the gate end of this transistor inputs a write command signal from a microcomputer (COM).

CI is an integration capacitor connected to the collector side of the transistor QI, Q2 is a driver transistor connected to this capacitor, and (LED) is a display element connected to this transistor. In the present invention having the above configuration, when the write command pulse wr is output from the microcomputer (COM), this pulse of several milliseconds is integrated by the capacitor CI, and as a result, the display element (LED) However, the light will emit light for a period of 2 to 3 seconds that can be visually confirmed.

Adding further explanation, the pulse wr is the transistor Q
When applied to the base of I, this transistor QI turns on and current flows through the capacitor CI, charging it.

During the period of 2 to 3 seconds during which the capacitor CI is charged, the transistor Q2 is turned on, and the display element (LED), which is a light emitting diode, emits light for 2 to 3 seconds. Transistors Q1 and Q2 perform an operation similar to that of a monostable multipipulator. Note that the transistor Q1, capacitor CI, etc. constitute a limited voltage generator 21, and the transistor Q2, display element (LED), etc. constitute a switch circuit 22. Display DP is limited voltage generator 21
and a switch circuit 22. Further, the display element (LED) may be a light emitting device or a small lamp. As described above, the present invention has a memory M, in which each channel selection data corresponding to each reception channel is written and stored, and for each channel selection operation, the above channel selection data corresponding to this channel selection is performed. The present invention is applied to a tuning device of a receiver that reads data from the above-mentioned terminal and applies a tuning voltage to the tuner 2.

According to the present invention, when writing the tuning data into the closing memory, the signal wr of the write command is integrated, the light is turned on for a certain period of time from the start of writing the tuning data, and then the light is automatically turned off to perform the tuning operation. This method of confirming writing to memory is characterized in that it can be confirmed from the outside by displaying, for example, blinking, that the channel selection data has been written to the memory. Are you there?
This can be visually confirmed, and the operator can be freed from the task of selecting a channel by checking the blinking display. As a result, a sense of security can be obtained during the data writing operation, and it is also possible to check whether there is an operational error or not.

[Brief explanation of the drawing]

FIG. 1 is a block schematic diagram of a channel selection device in which the present invention is used, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. M: Memory, 2: Tuner, M: Write command (signal)
, DP: display device, 21: limited voltage generator, 22: switch circuit. Figure 2: Shipboard

Claims (1)

[Claims] 1 has a memory, writes and stores each tuning data corresponding to each reception channel in this memory, and reads out the tuning data corresponding to this tuning from the memory for each tuning operation. , a channel selection device of a receiver that applies a channel selection voltage to a tuner, comprising: signal branching means for branching a write command signal sent to the memory when writing the tuning data; A limited voltage generator that forms a continuous limited voltage of a desired length, and a switch circuit that operates an optical display element for a certain period of time from the start of a writing operation in response to this limited voltage. A device for checking operation of writing tuning data into memory in a tuning device of a receiver, characterized by: