JPH04145710A - Power amplifier unit with cooling device - Google Patents

Abstract

PURPOSE:To obtain an optimum temperature characteristic for the power amplifier by providing a temperature sensor, a radiator for a heat sink, a Peltier element and a control section for current control of the Peltier element to the unit. CONSTITUTION:A temperature sensor 1 detects a temperature rise of an aluminum block 4 and a control section 5 controls a DC voltage applied to a Peltier element 2 fixed to the block 4. For example, when the temperature rise of the FET 7 is high, a current flows to the N pole of the element 2 to the P pole, the DC voltage gets higher, a heat in the FET 7 is absorbed forcibly by a pumping actin of the element 2 and is dissipated toward the heat sink radiator 3 in contact with the other face of the element 2. The control section 5 applies current control by the temperature detection information of the sensor 1 in this way and the heat in the FET 7 is controlled within a permissible temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power amplifier unit with a cooler, and more particularly to a power amplifier unit with a cooler having a function of controlling the cooling temperature of the cooler.

[Conventional technology]

Conventional power amplifier units with coolers generally use a forced air cooling method using a large radiator for a heat sink fixed to the power amplifier body to be cooled, or a fan provided externally.

[Problem to be solved by the invention]

In the conventional cooling method for the power amplifier unit body described above, the internal heat generated by the FET in the power amplifier is diffused by a heat sink via an attached radiator or by a fan, so the cooling temperature varies depending on the environmental temperature. There was a drawback that the characteristics were not taken into account, and when used in conditions with large temperature differences, the allowable temperature of FETs etc. could not be satisfied.

[Means to solve the problem]

A power amplifier unit with a cooler according to the present invention is a power amplifier unit with a cooler that cools an aluminum block equipped with a microstrip circuit line board and a field effect transistor, in which a temperature sensor fixed to the aluminum block detects temperature. and a thermoelectric cooling element having one end fixed to the aluminum block and the other end fixed to a heat sink radiator, and a control section controlling a current flowing through the thermoelectric cooling element based on temperature information from the temperature sensor.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a circuit diagram of a cooler of this embodiment. The embodiment shown in FIG. 1 consists of an aluminum block 4. FET (Field Effect T) for power amplifier
transistor) 7, a microstrip circuit line 6, and a temperature sensor 1 fixed to the aluminum block 4 constituting the cooler. A Peltier element 2 also fixed to the aluminum block 4. Radiator for heat sink 3. It is composed of a control section 5. Here, the circuit section of the power amplifier unit is constituted by a combination of a microstrip circuit line board 6 and an FET 5, and is mounted within an aluminum block 3.

Next, the operation of this embodiment will be explained. The temperature sensor 1 detects the temperature rise of the aluminum block 4, and the controller 5 controls the DC voltage value 8 applied to the Vertier element 2 fixed to the aluminum block 4. For example, if the temperature rise of the FET 5 is high, a current flows from N to P of the Peltier shown in FIG. It is dissipated by the heat sink towards the radiator which is in contact with the other surface. In this manner, the control section 5 performs current control based on the temperature detection information from the temperature sensor 1, and the FET can be controlled within the permissible temperature by the Peltier effect.

〔Effect of the invention〕

As explained above, the present invention includes a temperature sensor, a radiator for a heat sink, a Beltier element, and a control section for controlling the current of the Beltier element, thereby controlling the amount of heat absorbed and dissipated by the Beltier element to optimize the amount of heat absorbed and dissipated by the Beltier element. This has the effect of providing a power amplifier with excellent temperature characteristics.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a circuit diagram of the embodiment. 1...Temperature sensor, 2...Bertier element, 3...
-Radiator for heat sink, 4...aluminum block, 5...control unit, 6...microstrip circuit line board, 7...FET18...DC voltage value.

Claims (2)

[Claims] 1. In a power amplifier unit with a cooler that cools an aluminum block equipped with a microstrip circuit line board and a field effect transistor, a temperature sensor for detecting temperature fixed to the aluminum block, and one end fixed to the aluminum block, A power amplifier unit with a cooler, comprising: an electronic cooling element whose other end is fixed to a heat sink radiator; and a control section that controls a current flowing through the electronic cooling element based on temperature information from the temperature sensor. 2. 2. The power amplifier unit with a cooler according to claim 1, wherein the electronic cooling element is a Peltier element.