JPS5992725A - Power source controller for acoustic device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply control device for audio equipment.

In general, in audio equipment, -C is the power supply -A7J] is performed manually, so for example, if you lift the radial A receiver and turn on the radial Δ receiver before going to sleep. <
I often forget to use the power source A).

Mako, 7-bunoz: Niya Disc Shire X7, etc.;
13 I"Ct> Lid-like problem is raw sill, Den III
If 77'7 is performed using a rima, there are drawbacks such as the interruption during the performance and the interruption for a certain period of time after the end of the performance.

Therefore, the present invention has been made in order to (1) eliminate the drawbacks of the prior art as described above. The purpose is to provide a power supply control device for the 'A' 13i device that can be turned off automatically.

The electric wire control device according to the present invention is characterized in that it includes a number of devices that detect the absence of a signal and cut off the power in the absence of a signal 11-1.

Below, I will use drawings to explain Akira Kinie.

FIGS. 1 and 2 are block diagrams showing an embodiment of the present invention, and are examples of radio A reception. The information received by the antenna 1 is manually inputted into the input signal at a ratio of 1:2, and after amplification, is mixed with the output of the local oscillator 12 and C in the mirror 13, and frequency converted. The output of the mirror 13 is amplified by J2 by the intermediate frequency amplifier 3 and then sent to the detector 4. The detection output is
-A is applied to the amplifier 5 and then drives the speaker θ.

The output of the function switch 7 is also connected to the C1 low resistor 1'? via the switch 8. +, R2, and a capacitor C1. The level of this smoothed output is compared with the comparison voltage applied to the negative phase input of the inverter 9 and the negative phase input. This comparison voltage is applied to a variable resistor 11, so that the voltage level can be freely adjusted. The output of comparator 9 is power on/off relay 10
What is the input of the drive circuit 15 of this drive circuit 15?
consists of a drive 1, a transistor OI, a base resistor R3, etc., and a relay 10 inserted between the transistor QIO) and the power source is controlled to be on/off depending on the output of the comparator 9.

The following is a 11M configuration shown in FIG. 1, and FIG. 2 shows a power supply circuit controlled by the relay 10. 1 (3 is the power plug, 17 is the normally-on contact of beam 1 and 10, 18 is the power supply 1-lance, 19 is the rectifier,
20 is a smoothing capacitor.

- In the 474 configuration shown in Figure 1.2, the switch 7°8
The explanation is based on the case where is in the state shown in the figure. If there is a received signal, the detected signal is smoothed by the smoothing circuit 14, and the level of the negative phase input of the controller 9 becomes higher than its positive phase input. Therefore, the output of the comparator 9 is at a low level, and the transistor Q1 is turned off. Therefore, relay 10 is not energized and relay contact 17 in FIG. 2 remains on.

When the received signal is lost, the level of the negative phase input of the comparator 1 node 9 decreases, and the -C positive phase input signal also becomes small, and transistors 1 to Q1 are turned on at time ts. Therefore, the relay 10 is energized and the relay contact 17 in FIG. 2 becomes A], and the power is cut off.

It is convenient to select the time constant of the smoothing circuit 14 to be relatively thick so that the operation does not change unnecessarily due to a temporary drop in the received radio wave. By adjusting the variable resistor 11, the sensitivity of the comparator 9 can be set.Also, if the switch 8 is set to A, the automatic power off control function will be stopped. If this function is not required, this switch 8 can be turned off.

FIGS. 3 and 4 are block diagrams of embodiments of the present invention, in which an input signal resource (e.g., a tape screen (IN-1 and a radio button, IN-2)) is used as an input signal resource. This is an example of applying Kikomei to the main amplifier. 21 and 22 are the input signal sources (IN-1 and 1).
There is a non-receiving signal (Il-2) (which is amplified by non-bu C), and the output of these amplifiers is passed through the Gokyu selection switch 2;
input to I. This smoothed output is applied to the negative phase input of the 11-phase amplifier 9, and the 11-phase input is connected to the variable resistor 1.
1 is applied, and its output is supplied to the drive circuit 15 that drives the ray 10.

Then, as shown in FIG. 4, the normally on contact 17 of the relay 10 is controlled to be on/off (2+1). Incidentally, 24 and 25 are the △C outlets 1 to 1, and the △d power source via the relay contact 17 is led out.

If the switch 23 selects the input signal source 1N-1 (deep data output) and there is a signal, the charge is transferred to the capacitor 01 of the smoothing circuit 17I and the inverse of the J3 recomparator 9 is output. The phase input is also at a high level. Therefore, the comparator output is at a low level, transistor Q1 is off, and relay 10
(Since it is de-energized, the relay contact 17 remains on.

When Dave reproduction ends and the signal disappears, the smoothing circuit 14
The terminal voltage of the capacitor 'J-C+' decreases, and the output of the comparator 9 transitions to a high level. To this J:sl-
Since transistor Q+ is turned on and relay 10 is energized, the power is turned off. Following C18C Au1Heret2
AC power is supplied from 4 or 25 to the arp deck because the power is automatically turned off at the end of the performance. Even when the input signal source IN-2 (tuner) is selected by the switch 23, it operates in exactly the same way, so this radio tuner also receives AC power from △CC 1-2 or 25.
: If you leave it alone, the power will automatically turn off when there is no reception signal.

In addition, please set the switch 23 to the contact a position.
Since the terminal voltage of the terminal C is always maintained at a high level and the output of the 4-C comparator 9 is always maintained at a low level, the self-1IiIJ1Tl1 function of the power supply is stopped.

J: So, if this number of layers is a must, all you have to do is move the switch 23 to terminal a and go to a3.

As mentioned above, according to the present invention, a very simple 4f4 configuration C,
This has the advantage that when the reproduction output of the audio equipment is lost, the power can be automatically turned off and folded, and problems such as wastage of power are eliminated.

[Brief explanation of the drawing]

1 and 2 are a block diagram of an embodiment of the present invention, FIG. 13, and FIG. 4 are diagrams of another embodiment of the present invention. Explanation of symbols of main parts 9...Level T1 amparator 10...Relay 11...Variable resistor 1/l...Smoothing circuit 155... ...Relay drive circuit also/[l] Curtain 3 Figure 10 Vcc Tail d diagram/R

Claims (1)

[Claims] The feature of this device is that it detects the absence of a signal IU and turns off the power when the signal is not present.