TMB8PI14

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RF Accessories are often used to improve performance in communication technologies or in any electrical circuit design. The TMB8PI14 is an RF accessory that is an adjustable gain power amplifier suitable for K/Ka/Ku/V bands. It is a three-stage device that operates either in the linear region or in the saturation region, depending on the application. The amplifier is composed of a low noise amplifier (LNA), a variable gain amplifier (VGA) and an output power amplifier (PA). The TMB8PI14 is used predominantly in communication systems such as cellular base stations and VSAT systems.

The adjustable gain power amplifier of the TMB8PI14 provides a great deal of flexibility in controlling the power delivered to the output stage. It has an adjustable gain range of 20-30 dB with a nominal gain of 26 dB. The gain is adjusted by varying the bias current of the VGA which in turn affects the power delivered to the output stage and the gain of the device. The adjustable gain power amplifier of the TMB8PI14 also provides remarkably flat gain characteristics when operating in the linear region.

The signal conditioning portion of the TMB8PI14 consists of the LNA and the VGA. The LNA stage amplifies the input signal before the VGA stage amplifies it further. The LNA provides a low noise figure of typically 1.5 dB. The VGA serves as an adjustable gain amplifier and has an adjustable gain range of 20-30 dB with a nominal gain of 24 dB. The gain is adjusted by varying the bias current of the VGA. The LNA and VGA are both protected against overload and have temperature compensation circuit.

The output power amplifier (PA) stage then amplifies the signal from the VGA stage. The PA has a maximum output power of up to 40 dBm under saturated or linear operation. The linear power gain can be further increased by up to 4 dB by adjusting the bias voltage of the PA. The amplifier has a measured noise figure of 3.0 dB and the output is temperature stabilized by a temperature compensation circuit.

TMB8PI14 is designed to operate over different frequencies including K/Ka/Ku/V. It is suitable for applications requiring high linearity and dynamic range such as VSAT and cellular base stations. The adjustable gain power amplifier provides flexibility in controlling the power delivered to the output stage as well as remarkably flat gain characteristics when operating in the linear region. In addition, the amplifier has a measured low noise figure of 3 dB and a temperature compensation circuit that ensures a stable power output.

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