Stagger tuned amplifier pdf

The characteristics of these amplifiers are shown below. The following image shows the main relationship between individual stages amplification characteristics within a stagger tuned amplifier.

The amplifier using stagger tuning has greater BW, faster passband and number of stages used. The flatter will be the passband. These stages include similar resonant circuits. In the following characteristics, the staggering decrease in the total amplification of the middle frequency to 0.

At middle frequency, every stage includes 0. Therefore, the corresponding voltage amplification for each stage of the stagger will be 0.

Therefore the corresponding gain BW product for each stage of stagger tuned pair can be 0. The thought of stagger tuned can be simply expanded to additional stages.

In 3-stage staggering, the tuning of the primary circuit can be adjusted to a lower frequency than the center frequency.

The 3rd circuit can be adjusted to high frequency compared with middle frequency. The tuned frequency which is in middle is adjusted at the precise center frequency. In a stagger tuned amplifier, the two amplifiers like single tuned cascaded are utilized with separate resonant frequencies. Based on the above two frequencies fr1 and fr2, the selectivity function can be written as. The total gain of these stages is equal to the product of two stages of individual gains.

Thus, this is all about Stagger tuned amplifier. From the above information finally, we can conclude that these amplifiers are usually designed so that the total frequency response exhibits maximum flatness approximately the middle frequency. It requires several tuned circuits to operate in combination. In this type of tuned amplifier, resonant frequencies are altered or staggered.

Hence it is known as a stagger tuned amplifier. It provides greater bandwidth. But the selectivity of the frequency and tuning of the tank circuit is difficult. It is mainly applicable in radio receivers of the RF amplifier stage. As the operation of this circuit is represented using the rational function, the filter responses of Chebyshev and Butterworth filters can be derived. The separation of bandwidth is equal to the phase bandwidth of individual tuned circuits connected because the two resonant frequencies are staggered.

As we know that the double-tuned amplifier provides a greater bandwidth of 3dB with steeper sides and a flat top. But the alignment of the double-tuned amplifier is difficult. To solve this issue, it is necessary to cascade two single-tuned amplifiers with a certain bandwidth.

The resonant frequencies of two single tuned cascaded amplifiers can be adjusted and separated by an amount, to produce the bandwidth that is equal to the bandwidth of individual stages.

As the resonant frequencies are staggered or displaced, we call it a stagger-tuned amplifier. A stagger tuned amplifier circuit design with two single-stage stagger cascaded amplifiers shown below. In this circuit, stagger tuning is done by resonating tuned circuits such as L1 C1 and L2 C2 to different frequencies slightly.

The stagger tuned amplifier working is explained with the help of amplification characteristics of two single tuned cascaded amplifiers and the staggered pair amplification characteristics of the two stages. The frequency response between the overall response of the two-stage amplifier and individual two-stage single tuned cascaded amplifier in stagger tuned amplifier is shown below. Due to the staggering of resonant frequencies, the total amplification of the center frequency is reduced to 0.

At the center frequency, the amplification factor of individual stages is 0. Hence the equivalent amplification factor per stage of the staggered tuned amplifier is 0. Here, the 3dB bandwidth half-power bandwidth of the staggered pair is 1. Hence the gain-bandwidth product of each stage of a staggered tuned amplifier or staggered pair is 0.