JPH0394171A - Readout setting circuit - Google Patents

Abstract

PURPOSE:To reduce the number of signal lines to a readout setting circuit and to simplify wiring by providing resistors serially connected to plural setting switches, reading set voltage generated by the resistors and detecting the set state of the setting switch. CONSTITUTION:The readout setting circuit 1 incorporating an A/D conversion circuit and a constant-current circuit 2, the setting switches S1-S4 and the resistors R1-R4 serially connected to the switches are provided. When the switches S1-S4 are turned on, a constant current flows from the circuit 2 to the resistors R1-R4 and the different set voltages are respectively generated by the resistors R1-R4. A/D converted and displayed on an oscilloscope. Thus, the different set voltages by different resistance values are detected and the information of the respective setting switches S1-S4 can be read. The number of the signal lines to the circuit 1 is reduced and the wiring is simplified.

Description

[Detailed Description of the Invention] (a) Industry-42 Field of Application This invention relates to a readout setting circuit for an oscilloscope with a readout, and is particularly useful for easily detecting the setting status of setting switches, rotary switches, etc. The present invention relates to a preferred readout setting circuit.

(b) Prior Art Conventionally, many readout setting circuits for oscilloscopes with readout have been provided as shown in FIGS. 4 and 5.

FIG. 4 is a block diagram of a readout setting circuit using, for example, four setting switches, and FIG. 5 is a block diagram of a readout setting circuit using rotary switches.

In the figure, 5 is a knob for operating a rotary switch, 6 is a rotary switch, 10 is a readout setting circuit, 1l is a digital code switch for digital coding, 12 is a signal line, and 81 to S4 are readout setting switches. .

Oscilloscope setting switch 81-S with readout
4 using the readout setting circuit 10 (Fig. 4), set the setting switches Sl to S4 to O.
A predetermined function is selected by a combination of the setting switches 31 to S4 which are set to N and turned ON, thereby forming a readout setting state.

A digital code signal corresponding to this setting state is created, and this digital code signal is used for the readout setting r (11 path 1
0, the setting states of the setting switches 81 to S4 were detected and a lead-out display was performed.

Further, the input addendator, sweep time, etc. of the oscilloscope with readout are set using rotary switch 1 shown in FIG.

In the case of this rotary switch 6, the setting state of the rotary switch 6 is converted into a digital code signal by the digital coat switch 11 and supplied to the readout setting circuit 10 to detect the setting state of the rotary switch 6.

The setting state detected in this manner is read out by the readout setting circuit 10, and a predetermined readout display can be performed.

(C) Problems to be Solved by the Invention However, the readout setting circuit 10 for the conventional setting switches 81 to S4 and the rotary switch 6 described above requires signal lines equal to the number of setting switches SL to S4. Further, signal lines 12 corresponding to the number of rotary switches 6 set are required.

For example, when there are 20 contact settings, the digital code consists of 5 bits, and the signal line 12 to the readout setting path 10 is wired with 5 wires, and as the number of contacts increases, the number of signal lines 12 also increases. .

As described above, the number of signal lines 12 increases due to the number of contacts, and the wiring to the readout setting circuit 10 becomes complicated.

This invention has been made in view of the above points, and its purpose is to eliminate the drawbacks of the conventional example, convert the setting state of a setting switch or rotary switch, etc. into a set voltage, and convert this set voltage into a set voltage. An object of the present invention is to provide a readout setting circuit which requires only one wiring for the signal line to the detection and readout setting circuit.

(2) Means for Solving the Problem The readout setting circuit of the present invention is a readout setting circuit that displays cursor lines, controller settings, etc. on the screen of an oscilloscope with a readout using a plurality of setting switches. In, Mr. The device includes resistors connected in series to the plurality of setting switches, and the setting state of the setting switches is detected by reading the voltage set by the resistors.

Further, the setting state can be detected by using the plurality of setting switches as multi-contact lever switches.

Furthermore, the setting state can be similarly detected by using a multi-contact rotary switch as the plurality of setting switches.

In addition, a rotary switch displays the settings of the regulator on the tube surface of the oscilloscope with a readout.In the slide-out setting circuit, a volume is provided coaxially with the rotary switch, and the rotation angle of the rotary switch and the The rotation angle of the volume is configured to match the rotation angle of the volume, and the setting state of the rotary switch is detected by reading the voltage set by the variable resistance value of the volume.

Furthermore, the rotary switch can be replaced with a multi-contact lever switch, and the setting state can be detected using a slide volume or a disk volume.

(E) Function According to the present invention, in a readout setting circuit that displays a cursor line, a setting value of a controller, etc. on the tube surface of an oscilloscope with a readout using a plurality of setting switches, a rotary switch, etc., the plurality of Connect a resistor in series to the setting switch, and set the setting switch to ONL.
In this case, a constant current flowing through this resistor causes a setting change, and the setting state of the setting switch can be detected.

Ten. When the setting switch is a multi-contact lever switch or a multi-contact rotary switch, the setting state can be detected by generating a setting voltage for each set switch using a resistor connected in series.

In addition, in order to detect the setting state of a rotary switch used for manual attenuation, a volume is provided on the same axis of the rotary switch, and the rotation angle of this rotary switch is configured to match the rotation angle of the volume. The setting state of the rotary switch can be detected by reading the set voltage using a constant current flowing through the variable resistance value of this volume.

In addition, the setting voltage is detected in the same manner as above by using the variable resistance value of the volume that is set in conjunction with the multi-contact lever switch using a slide volume or disc type volume, and the setting voltage of this multi-contact lever switch is set. Can read the status.

In this way, since the set voltage is detected from the set resistor or variable resistor, only one signal line is needed to be supplied from the variable resistor of the setting switch or rotary switch to the readout setting circuit, and wiring etc. It gets easier.

The detected setting voltage is digitized by an A/D converter built in the readout setting circuit, and the determined setting state can be read out to display the tube direction.

(f) Embodiment An embodiment of the readout setting circuit according to the present invention will be explained based on FIGS. 1 to 3.

Note that the same parts as in the conventional example are given the same reference numerals, and the explanation thereof will be omitted.

Fig. 1 is a block diagram of a readout setting circuit using four setting switches, Fig. 2 (A) is a block diagram of a readout setting circuit using a lever switch with four contacts, and Fig. 2 (B) is a block diagram of a readout setting circuit using four setting switches. ) is a block diagram of a readout setting circuit using a four-contact rotary switch, and FIG. 3 is a block diagram of a readout setting circuit using a rotary switch and a volume control.

In the figure, 1 is a readout setting circuit with a built-in A/D conversion circuit and a constant current circuit, 2 is a constant current circuit of the readout setting circuit, 3 is a multi-contact lever switch, 4 is a multi-contact rotary switch, and 7 is a multi-contact rotary switch. This is a volume mounted on the same axis of the rotary switch 6.

Setting switches S1 to S4 are readout setting switches, and select functions to be displayed on the tube surface of the oscilloscope with readout.

For example, when the setting switch S1 is turned on, a cursor line is displayed, and when the setting switch S2 is turned on, the manual voltage of channel I of the oscilloscope is displayed.

Since a plurality of setting switches Sl-34 can be turned on at the same time to select different functions, 16 types of setting states can be determined by combining the four setting switches 31 to S4.

When the setting switches 81 to S4 are turned on, the resistors I to R4 connected in series to the setting switch St-34
A constant current flows from the constant current circuit 2 built into the readout setting circuit 1, and each set voltage is generated by the resistors R1 to R4. (not shown) is converted into a digital signal, and the settings of predetermined functions are read out on the tube surface of an oscilloscope with a readout.

Now, the resistors R1 to R4 connected in series to the setting switches 81 to S4 are set to, for example, 1 kΩ. 2kΩ. 4kΩ
If it is 8kΩ, the set resistance values will be different values as shown below.

In this way, with the four resistors R1 to R4, 16 different setting states of resistance 4+'i are obtained, and this y4
Different set voltages are detected depending on the resistance values, and information on each of the setting switches Sl to S4 can be read.

If the plurality of setting switches 81 to S4 are multi-contact lever switches 3 or multi-contact rotary switches 4, the configuration shown in FIG. 2(A)
, As shown in (B), a resistor Rl~ is connected to the switch contact.
Connect R4 and apply a constant current in the same way as above to detect the set voltage.

In this way, the read-out display can be performed by using the multi-contact L1-point lever switch 3 or the multi-contact rotary switch 4 instead of the setting switches 81 to S4.

A readout display accompanying switching of the input attenuation, sweep time, etc. of the oscilloscope is achieved by attaching a rotary volume 7 to the rear of the rotary switch 6 so as to rotate in synchronization with the coaxial -L of the rotary switch, as shown in FIG.

When the axis of the rotary switch 6 is rotated, the volume 7 is also rotated at the same time, and the resistance value between the terminal 7o and the terminal 7b of the volume 1-7 changes.

The terminal 7a of the volume 7 is grounded, and the terminal 7b is connected to the constant current circuit 2 of the readout setting circuit 1, and at the same time is outputted to the A/D converter of the readout setting circuit 1.

In this way, the constant current from the constant current circuit 2 connected to the terminal 7b of the volume 7 is transferred from the terminal 7b to the terminal 7a (ground).
A set voltage is generated according to the resistance value between terminal 7b and terminal 78.

That is, the set voltage generated by the change caused by the rotation of the rotary switch 6 is detected and converted into a digital signal by the A/D converter of the readout setting circuit 1. This digital signal is processed by a readout setting circuit 1 and displayed as a readout setting value of the rotary switch 6.

In the case of a readout setting circuit (not shown) that uses a multi-contact lever switch instead of the rotary switch 6, install a slide volume or a disc volume to operate in conjunction with the multi-contact lever switch. By this, the setting state of the multi-contact lever switch can be read in the same manner as described above.

In this way, it is possible to detect setting information due to the rotation of the rotary switch 6, multi-contact lever switch, etc., and display the detected setting status as a readout on the screen of the oscilloscope with readout using the readout setting circuit l. can.

(g) Effects of the invention As described above, the readout setting circuit according to the invention has the following features:
This has the effect of reducing the number of signal lines from multiple setting switches to the readout setting circuit, simplifying wiring, etc.

Further, since only a DC voltage is applied to the setting switch and the signal line, there is also the effect that noise from the readout setting circuit is not superimposed.

In particular, in the case of readouts for rotary switches such as input attenuators and sweep times, it is possible to simply install a rotary volume without using special parts such as a digital code switch, resulting in lower costs and fewer signal lines. It has the effect of being able to

This lead-out setting circuit has the advantage that it can be used not only for read-outs of setting switches and rotary switches, but also for read-outs of multi-contact lever switches and other switches.

In addition, it has excellent features such as a simple structure, low cost, and easy implementation.

[Brief explanation of drawings]

1 to 3 show an embodiment of a readout setting circuit according to this invention, FIG. 1 is a block diagram of a readout setting circuit using four setting switches, and FIG. Figure 2 (B) is a block diagram of a readout setting circuit using a lever switch with contacts.
The figure is a block diagram of a leave-out setting circuit using a rotary switch and a volume control. 4 and 5 show conventional examples, and FIG. 4 is a block diagram of a readout setting circuit using four setting switches,
FIG. 5 is a block diagram of a readout setting circuit using a rotary switch. Description of the above notes]: Readout setting circuit with built-in A/D converter, 2: Constant current circuit built into the readout setting circuit, I5 3: Multi-contact lever switch, 4: Multi-contact rotary switch, 5: Rotary switch knob, 6: Rotary switch, 7: Volume, ? a. 7b, 7c: Volume terminals, Sl~S
4: 4 setting switches, Rl~R4: 4 resistors,

Claims (1)

[Claims] 1. In a readout setting circuit that displays a cursor line, a setting value of a controller, etc. on the tube surface of an oscilloscope with a readout, using a plurality of setting switches, the circuit is connected in series to the plurality of setting switches. Equipped with a resistor,
A readout setting circuit that detects the setting state of a setting switch by reading the voltage set by this resistor. 2. The readout setting circuit according to claim 1, wherein the plurality of setting switches are multi-contact lever switches to detect the setting state. 3. The readout setting circuit according to claim 1, wherein the plurality of setting switches are multi-contact rotary switches to detect the setting state. 4. In the readout setting circuit, which uses a rotary switch to display the setting values of the regulator on the tube surface of the oscilloscope with readout, a volume is provided on the same axis of the rotary switch, and the rotation angle of this rotary switch and the above volume are displayed. The readout setting circuit is configured to match the rotation angle of the rotary switch, and detects the setting state of the rotary switch by reading the setting voltage based on the variable resistance value of the volume. 5. The readout setting circuit according to claim 4, wherein the rotary switch is a multi-contact lever switch, and the setting state is detected using a slide volume or a disc volume.