JPH06334442A - High voltage controller - Google Patents

Abstract

PURPOSE:To obtain a signal wave of a high voltage with less distortion by subjecting a carrier of an optional frequency to frequency modulation with a signal wave such as a small AC signal, boosting the modulated wave into a high voltage by a transformer and demodulating the modulated signal in a state of the high voltage. CONSTITUTION:A signal wave 2 such as a small AC signal is subjected to frequency modulation by a VF converter, a modulated wave 3 is amplified by an FET or the like and the amplified wave is fed to a primary winding of a transformer 4. Then a high voltage modulation wave generated at a secondary side of the transformer 4 is fed to a circuit 8 comprising a choke coil and whose output voltage is proportional to frequency and a detection circuit 9 comprising a high voltage switching diode is used to detect the modulation signal and it is amplified to be a high voltage AC signal 7 or the like. Thus, the small AC signal or the like is amplified and no distortion is produced almost without the effect of an internal amplifier circuit and the transformer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a device for converting a signal wave such as a small signal AC signal into a signal wave such as a high voltage AC signal. A carrier wave (1) having an arbitrary frequency is frequency-modulated by a signal wave such as a small signal AC signal (2), and the modulated wave (3) is amplified to a state where a transformer (4) can be driven and transformed. The high voltage modulated wave generated on the low voltage side (5) of the transformer and on the high voltage side (6) of the transformer is added to the demodulation circuit, and the original signal wave such as small signal AC signal This is a device that can be converted into a signal wave such as a voltage AC signal (7). In this method, by increasing the winding ratio of the transformer, it is possible to easily control high-voltage AC signals, etc. with small-signal AC signals. Therefore, amplifiers or speakers using high voltage are used. It can be used for etc.

[0002]

2. Description of the Related Art Referring to FIG. 3, conventionally, in order to amplify a signal wave such as a small signal AC signal into a high voltage signal wave, the AC signal is not modulated but is amplified to a drivable state. ,
In addition to the transformer, a high voltage signal wave was obtained by increasing the winding ratio of the transformer.

[0003]

[Problems to be Solved by the Invention] However, with this method,
Distortion of the signal wave in the amplifier circuit by amplifying the transformer to a drivable state, deterioration of frequency characteristics in the transformer due to a large winding ratio of the transformer, distortion of the signal wave, etc. There was a problem.

[0004]

[Means for Solving the Problems] The structure will now be described. (A) In order to reduce distortion of a signal wave in an amplifier circuit due to amplification to a state in which a transformer can be driven, a frequency-modulated signal is applied. The method is to amplify the modulated wave. B) If the winding ratio of the transformer is set to a large value, the frequency characteristics will deteriorate and the signal wave will be distorted.
In order to reduce it, the frequency-modulated modulated wave is
It is converted to a high voltage as it is and demodulated after passing through a transformer.

[0005]

(A) Since the modulated wave is amplified as a simple ON / OFF signal in the amplifier circuit, the signal wave in the amplifier circuit operates so as not to be easily distorted. B) The signal wave that passes through the transformer is a modulated wave,
Since only high-frequency on / off signals are passed, it operates so as to reduce the influence of increasing the winding ratio of the transformer.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the signal wave (2) such as a small signal AC signal is frequency-modulated by a VF converter, and the modulated wave (3) is amplified by an FET or the like so that the voltage of the transformer (4) is increased. The high-voltage modulated wave applied to the primary side and generated on the secondary side of the transformer is added to the circuit (8) whose output voltage is proportional to frequency, which is composed of a choke coil, and is composed of a high-voltage switching diode. The circuit configuration is such that a detection circuit (9) detects and amplifies a high-voltage AC signal or the like (7). Further, by adding an output terminal and a demodulation circuit on the secondary side of the transformer, it is possible to generate a high voltage AC signal or the like having a phase opposite to that of (7). The modulation method can also be essentially the same phase modulation.

[0007]

As described above, according to the present invention, the small signal AC signal or the like can be amplified without being affected by the internal amplifier circuit or the transformer, so that the reproducibility of the output signal with respect to the input signal is good. .

[Brief description of drawings]

FIG. 1 is a circuit configuration of the present invention.

FIG. 2 Example of the present invention

FIG. 3 Conventional circuit configuration

[Explanation of symbols]

 1 is a carrier wave 2 is a signal wave such as a small signal AC signal 3 is a frequency-modulated wave 4 is a transformer 5 is a low voltage side human power of the transformer 6 is a high voltage side output of the transformer 7 is a high voltage AC signal Signal wave 8 is a circuit whose output voltage is proportional to frequency 9 is a detection circuit

Claims (1)

[Claims] 1. A carrier wave having an arbitrary frequency is frequency-modulated by a signal wave such as a small signal AC signal, the modulated wave is boosted to a high voltage by a transformer, and then demodulated in a high voltage state. A device for obtaining a signal wave amplified to a high-voltage AC signal or the like.