LTC1068-200IG#PBF

Application Field and Working Principle of LTC1068-200IG#PBF

Introduction

The LTC1068-200IG#PBF is an active low-pass filter IC with an input frequency range up to 1GHz. It provides a wide 3-364 MHz filter span with an adjustable 0-93 dB rejection rejection and passband loss of 0.5 dB. In addition, it features an adjustable 0-40 dB input/output isolation and an adjustable 0-40 dB phase shift. This device is used for a variety of applications including FM modulation, civilian and military communications, and more.

Application Field

The application field of LTC1068-200IG#PBF can be categorized into two parts. Firstly, it can be used as a low-pass filter to reject high frequency signals and to reduce interference between frequency bands. Secondly, it is suitable for radio frequency (RF) signal modulation, such as Frequency Modulation (FM) modulation. This is because the phase shift and dB rejection capabilities allow to control the amplitude, frequency, and phase of the signal accordingly, providing high-precision modulation.

Besides its application as a filter, the LTC1068-200IG#PBF is also useful for civilian and military communications. Since it provides a high level of input and output isolation, it can filter out unwanted signals that could interfere with the communication. It is also designed to reduce harmonics distortion, thus providing clean and reliable wireless transmission.

Working Principle

The LTC1068-200IG#PBF is an active low-pass filter. It works by providing adjustable pass and stop bands, resulting in a flat passband with steep reject bandwidth beyond the passband. The flat passband has an adjustable 0-93 dB rejection rejection and a passband loss of 0.5 dB. It also features adjustable 0-40 dB input/output isolation and an adjustable 0-40 dB phase shift.

The active filter consists of an amplifier and resistor network connected in series. The resistor network is made up of two pairs of resistors connected in series, with one pair connected to the input signal and the other pair to the output. The signal first passes through the first pair of resistors, which filters out frequencies above the cutoff frequency. The signal then passes through the amplifier, which amplifies the signal and compensates for signal loss. Finally, the signal passes through the other resistor pair to complete the signal filtering process.

Conclusion

The LTC1068-200IG#PBF is an active low-pass filter IC with a wide frequency range up to 1GHz. It provides a wide 3-364 MHz filter span with an adjustable 0-93 dB rejection rejection and a passband loss of 0.5 dB. In addition, it features an adjustable 0-40 dB input/output isolation and an adjustable 0-40 dB phase shift. It can be used in various applications, such as frequency modulation, civilian and military communication systems, and more. The working principle of the device is based on an amplifier and resistor network, which allows the adjustment of the passband, reject bandwidth and phase shift characteristics of the signal.