JPS6042557Y2 - Wireless remote control device oscillator - Google Patents

Description

[Detailed description of the invention] The present invention is an oscillator for a wireless remote control device that modulates a VHF or tJHF carrier wave with an ON/OFF signal, and an inverter 2 is provided at the final stage of a modulated wave oscillation circuit 1. Two modulated wave signals of positive phase and reverse phase are output, and one of the step-up transformers 3 is output by the modulated wave signals.
The transistors Q, Q2 connected to the next side are turned on alternately, and the secondary voltage of the step-up transformer 3 is supplied to the oscillation circuit 4, and a carrier wave corresponding to the output of the modulated wave oscillation circuit 1 is oscillated. This relates to an oscillator for a wireless remote control device.

In the case of transmitting a carrier wave of 260 MHz, for example, in the oscillator of a conventional wireless remote control device, a 006P type dry cell battery (9) is used as a power source, and the 006P type is used as a general oscillator consisting of a modulation circuit and an oscillation circuit. Power was supplied from dry cell batteries.

Therefore, as is well known, the 006P type dry battery has problems in that it is large in shape and weight, and is also high in cost.

The present invention has been proposed in view of the above points, and uses two modulation signals of positive phase and negative phase to alternately turn on the transistors connected to the primary side of the step-up transformer, thereby increasing the secondary voltage of the step-up transformer. By supplying the oscillation circuit with The object of the present invention is to provide an oscillator for a wireless remote control device that is low voltage, compact, and inexpensive.

The present invention has been devised in view of this point, and will be described in detail below with reference to Examples.

In Fig. 1, 1 is a modulated wave oscillation circuit, which generates high frequency (12
KHz) on/off signal is output.

The output of the modulated wave oscillation circuit 1 is boosted by a booster circuit 5, a high voltage is applied to the oscillation circuit 4, and the carrier wave (260MH2) is modulated with the modulated wave signal and output.

6 is a power source using AA batteries, and 7 is a push button switch.

FIG. 2 is a specific circuit diagram of the circuit shown in FIG. 1, in which an inverter 2 is provided at the final stage of the modulated wave oscillation circuit 1,
Output two modulated wave signals of positive phase and negative phase to B respectively as shown in Figure 3 a and b, and repeat turning on and off the transistor Q with the modulated wave signal of output terminal A to modulate output terminal B. Transistor Q2 is repeatedly turned on and off using a wave signal.

Transistors Q□, Q2 are connected to both ends of the primary side of the step-up transformer 3, and transistors Q1. A high voltage is induced by the alternating on and off of Q2, and this voltage is rectified by diode D and used as a power source for the oscillation circuit 4, and this voltage is used as a modulation control signal.

Therefore, by using the step-up transformer 3 in a push-pull method in a state close to saturation, the magnetic efficiency of the step-up transformer 3 can be improved, the step-up effect and conversion efficiency of the step-up transformer 3 can be improved, and a high voltage can be obtained on the secondary side. In particular, when forming a battery-less oscillator and using the solar cell 8 as the power source as shown by the dotted line in FIG. 2, it is necessary to improve the efficiency of the power source because the solar cell 8 is expensive. It is effective in such cases.

As described above, the present invention provides an inverter at the final stage of the modulated wave oscillation circuit to output two modulated wave signals of positive phase and reverse phase, and the modulated wave signal causes the primary side of the step-up transformer to be Since the connected transistors are turned on alternately to supply the secondary voltage of the step-up transformer to the oscillation circuit and to oscillate a carrier wave according to the output of the modulation oscillation circuit, two modulations of positive phase and negative phase can be performed. By alternately turning on the transistors connected to the primary side of the step-up transformer using a signal, the magnetic efficiency of the step-up transformer can be improved.
In addition, it has the advantage of improving the step-up efficiency and conversion efficiency of the step-up transformer and obtaining a high voltage on the secondary side.Therefore, there is no need to use a 006P type dry battery as the power source for the oscillator as in the past. The oscillator can be operated using a low-voltage, small-sized battery power source such as an AA dry cell or a solar cell, and therefore has the advantage of being small, lightweight, and inexpensive.

[Brief explanation of drawings]

Fig. 1 is a block circuit diagram of the oscillator of the wireless remote control device of the present invention, Fig. 2 is a specific circuit diagram of the same, Fig. 3a,
b is an output waveform diagram of the modulated wave oscillation circuit same as above. 1...Modulated wave oscillation circuit, 2...Inverter, 3...Step-up transformer, 4...Oscillation circuit, Ql, Q2... transistor.

Claims (1)

[Scope of utility model registration request] In an oscillator for a wireless remote control device that modulates a VHF or UHF carrier wave with an on/off signal, an inverter is provided at the final stage of the modulated wave oscillation circuit to output two modulated wave signals of positive phase and negative phase. The modulated wave signal turns on the transistors connected to the primary side of the step-up transformer alternately, supplies the secondary voltage of the step-up transformer to the oscillation circuit, and generates a carrier wave according to the output of the modulated wave oscillation circuit. An oscillator for a wireless remote control device that oscillates.