KR960006251A - High Frequency Amplifier Circuit in Wireless Terminal - Google Patents

Abstract

The present invention provides a high frequency amplification circuit of a wireless terminal, comprising: a high frequency input unit (12) for inputting the modulated high frequency and removing a DC component from the input, and an output signal of the high frequency input unit (12) and predetermined output control An output control unit 13 for changing the magnitude of the high frequency signal in response to the DC voltage supplied from the terminal 14, and a high frequency signal input from the high frequency signal transmitted from the output control unit 13, and removing the DC voltage component from the input signal. And an amplifying stage input unit 15 for supplying and outputting a predetermined bias to the signal, and an amplifying stage amplifier unit 16 for inputting the output signal of the amplifying stage input unit 15 and amplifying and outputting the input high frequency signal. do. According to the present invention, by providing an output control circuit for controlling the output of the high frequency signal, it is possible to freely adjust the high frequency output to prevent unnecessary high frequency output and to prevent other radio equipment from giving interference. In addition, there is an effect of reducing the current consumption of the power supply or battery of the wireless terminal itself.

Description

High Frequency Amplifier Circuit in Wireless Terminal

As this is a public information case, the full text was not included.

2 is a block diagram showing an embodiment of a high frequency amplification circuit according to the present invention.

Claims (6)

In a high frequency amplification circuit of a wireless terminal, a high frequency input unit (12) for inputting a modulated high frequency and removing a direct current component from the input, and an output signal of the high frequency input unit (12) and a predetermined output control terminal (14) The output control unit 13 changes the magnitude of the high frequency signal in response to the DC voltage supplied from the input signal, and the high frequency signal transmitted from the output control unit 13 is input to the high frequency signal from which the DC voltage component is removed. An amplification stage input section 15 for supplying and outputting a bias of the amplification stage; and an amplification stage amplifier section 16 for inputting the output signal of the amplification stage input section 15 and amplifying and outputting the input high frequency signal. Circuit. 2. The high frequency input unit (12) according to claim 1, wherein the high frequency input unit (12) comprises a first capacitor (C11) connected at both ends of an electrode between a high frequency input terminal (11) and a predetermined first node (N1). High frequency amplifier circuit. 3. The output terminal of claim 2, wherein the output control unit 13 includes: a first resistor R11 connected between the first node N1 and a ground terminal; and the output control terminal 14 and the second node. And a second resistor (R12) connected between N2) and a diode (D1) connected between the second node (N2) and the first node (N1). The terminal of claim 3, wherein the amplifying input unit (15) includes a second capacitor (C12) and a power supply terminal (18) connected at both ends of the electrode between the second node (N2) and the third node (N3). And a third resistor (R13) connected between the third node (N13) and a fourth resistor (R14) connected between the third node (N3) and the ground terminal. Amplification circuit. The coil L11 is connected between the power supply 18 terminal and the fourth node N4, and a base is connected to the third node N3. An amplifying transistor Q11 having a collector connected to the fourth node N4 and an emitter connected to a fifth node N5, and an electrode between the fourth node N4 and the high frequency output 17 terminal. Between the third capacitor C13 to which both ends of the third capacitor C13 is connected, the fifth resistor R15 connected between the fifth node N5 and the ground terminal, and between the fifth node N5 and the ground terminal. And a fourth capacitor (C14) connected to the high frequency amplification circuit. The high frequency amplification circuit according to claim 1, wherein the high frequency amplification circuit further includes a predetermined high frequency amplification circuit for amplifying and transmitting the modulated high frequency wave in front of the high frequency input unit. ※ Note: The disclosure is based on the initial application.