LMH1981MTX/NOPB Integrated Circuits (ICs)

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The LMH1981MTX/NOPB (hereinafter referred to as the “LMH”) is a line-level variable gain amplifier (VGA) that is used in the field of video processing. As the industry standard for video processing, the LMH has been used in many applications such as television, cameras, display systems, monitor systems, medical devices, and others.

The LMH was developed by National Semiconductor as an “active amplifier”. The LMH is a linear device and is based on the principle of trans-impedance. As such, it is able to amplify signals over a wide range of frequencies and levels without adversely affecting the desired signal. Additionally, the device has an adjustable gain range of 6dB to 18dB and provides a very low output noise floor. This low output noise is important for video processing applications where accurate and noise-free signals are required.

The internal architecture of the LMH consists of three main components: an input stage, a pole-zero amplifier, and an output stage. The input stage comprises of a series of rectification and filtering circuits that convert the incoming signal into a suitable form for the active amplifier. The pole-zero amplifier is the control point of the amplifier and is responsible for regulating the gain and ensuring linear performance. Finally, the output stage converts the amplified signal into the desired output level. The LMH also includes protection circuitry which helps protect the device from damage due to over current or excessive exposure to environmental conditions.

In terms of performance, the LMH is able to operate over a wide temperature range. It is also capable of handling input and output signals up to 1.2V, with a maximum output voltage of 18V. It is linear throughout the gain range, with a theoretical maximum gain of 34dB. Additionally, the device offers low output noise, low distortion levels, high linearity, and high stability over time. The LMH also features a built-in gain clamp so that the gain does not exceed a predetermined value.

In terms of video processing applications, the LMH can be used for the development of high-definition video systems, security systems, and other video-processing technologies. In particular, the LMH offers low-noise video amplification for applications such as video multiplexing, motion detection and tracking, and object recognition. Additionally, the device can be used for video displaying, broadcasting, and archiving. Moreover, the amplifier can be used in applications such as medical imaging and digital cinema.

In short, the LMH1981MTX/NOPB is an ideal line-level variable gain amplifier for the field of video processing. With its advanced architecture, exceptional performance, and extended temperature range, the LMH can provide high quality and reliable video amplification for a wide range of applications.

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