JPS58105632A - Receiver - 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 receiver that uses a battery as a power source, such as a portable radio, and spends a long time waiting for radio waves from a broken relationship, such as a broadcast radio.

Conventionally, receivers with a long reception standby time generally have a configuration as shown in FIG. That is, a low power circuit (1) with relatively low power consumption from the input section of the receiving MIIA to detection and amplification, and a signal detection circuit (2) that detects the input signal of the receiver or the signal from the desired partner station. ), a high-power circuit jl (3) that amplifies the received detected audio signal and outputs it from the speaker, and which consumes a large amount of power, and a power supply switch circuit (4) for operating this circuit.

In the above configuration, the low power circuit <17 always includes:
Power is supplied from the power supply (5), and the high power circuit (3)
), the power supply from the stain source (S) is normally cut off by the OFF operation of the power supply switch circuit (4).

When a signal for operating the receiver in the reception input is detected by the signal detection circuit (2),
By turning on the power supply switch circuit (4), power is supplied from the power supply (6) to the large power circuit (3), the audio signal is amplified, and the audio is transmitted through the speaker.

As described above, conventional receivers of this type generally take measures to reduce the power consumption of the high power circuit (3) in the standby state. However, in the case of broadcast radio receivers whose actual operation time is short and the standby state is overwhelmingly long, and portable radios used in similar conditions,
By reducing the power consumption of the high-power circuit (3) in this standby state, the usage time when operating in pantry mode is extended. However, since the low power circuit (1) is constantly supplied with power from the power source (5), the power consumption of this type of receiver is not sufficiently reduced.

This invention was made to solve the above-mentioned drawbacks.
During normal operation, power is intermittently supplied to the low-power circuit to keep it in a standby state for signal reception, and at the same time, the power consumption of this circuit is reduced, allowing the low-power circuit and high-power circuit to operate only when receiving signals. It is an object of the present invention to provide a receiver that can reduce power consumption during reception standby time by a factor of 11 by continuously supplying power from a power source.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 2, the same parts as in FIG. 1 are given the same numbers. (6) is a low power circuit in the standby state (
1) A monostable oscillation circuit that reduces the power consumption to a fraction of the above,
(7) is turned on and off by the output from this circuit (6)
This is a power switch circuit that performs F operation and intermittently supplies power from the power source (5) to the low power circuit (1).

Next, the operation of the above configuration will be explained.

The low power circuit (1) is driven intermittently by ON and OFF operation. At this time, the ratio of the time during which power is supplied from the power source (6) to the low power circuit (1) and the time during which power is not supplied is determined by the duty of the pulses generated from the monostable oscillation circuit (.). Therefore, the average power consumption while waiting to receive an input signal is determined depending on how much the duty of the pulse is determined. Note that the added monostable oscillation circuit (6) can be easily manufactured with much lower power consumption than that of the low power circuit (1).

Now, if the desired radio wave is received, the signal detection circuit (!
) is able to detect in this receiving input (a) a signal (b) for operating the receiver;
By setting the pulse width of the pulse signal (C) from the monostable oscillation circuit (6), the low power circuit (1) can be switched while the pulse signal (C) from the oscillation circuit (6) is being generated. It operates by receiving power (V) from the power supply (5) through the circuit (7), and outputs the output signal (d) from this detection circuit (2).
This stops the oscillation of the monostable oscillator circuit (5), turns on the switch circuits (4) and (7), and turns on the low power circuit (1) and the high power circuit (1) while receiving the receiver's power (a). 3) is continuously driven, the reception input (at) is amplified and detected, and the audio output is transmitted. When the desired reception input (a) disappears, the signal detection circuit (2) detects that the reception input (a) is no longer present;
The original standby state is restored, the low power circuit (l,) operates intermittently, and the high power circuit (3) stops operating.

As detailed above, according to the receiver of the present invention, the overall power consumption during a long period of time, including during operation, can be significantly reduced compared to conventional receivers in applications where the standby state is long. This makes it easy to change the power source from solar cells to solar cells, which has the advantage of saving energy for the receiver and making it extremely easy to install the device in places where there is no commercial power source, such as at the top of a mountain.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional receiver, and FIG. 2 is a block diagram showing an embodiment of the receiver in a receiving apparatus with a long reception standby time according to the present invention. (1)...Low power circuit, (2)...Signal detection circuit,
(3)...High power circuit, (4)...High power power supply switch circuit, (5)...Power supply, (6)...Intermittent drive circuit (monostable oscillation circuit), (7)... ...Low power power supply switch circuit. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Shin Kuzuno (1 other person)

Claims (1)

[Claims] (1) A low-power circuit and a high-power circuit are provided, and when the signal detection circuit detects reception of a desired reception input, a high-power power supply switch circuit is turned on to supply power from the power supply to the high-power circuit. In a receiver that waits for a long time to supply a signal, the power supply from the power supply to the above low power circuit is turned ON or OFF? The device includes a low power power supply switch circuit to be operated, and an intermittent drive circuit to intermittently drive the second switch circuit, and when the signal detection circuit detects a desired reception input, the drive of the intermittent drive circuit is stopped. At the same time, a receiver is characterized in that a low power power supply switch circuit is continuously turned on.