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Consider the following time parameters in development of solid state devices: 1. Domain growth time constant 2. Transit time 3. Dielectric relaxation time In the case of Transferred Electron Devices (TED), which of these are used?

Consider the following time parameters in development of solid state devices: 1. Domain growth time constant 2. Transit time 3. Dielectric relaxation time In the case of Transferred Electron Devices (TED), which of these are used? Correct Answer 1, 2 and 3

The various modes of operation of transferred electron device are classified on the basis of time in which various process occurs

τt: domain transit time

τd: dielectric relaxation time

τg: domain growth time

τo: the natural period of oscillation

Important Points

Mode

Time Relationship

Stable Amplifier

τo ≥ τt

Gundomain

τg ≤ τt

τo = τt

Quenched domain

τ g ≤ τt

τo = τt

Delayed domain

τg ≤ τt

τo > τt

CSA

τo < τg

τo > τd

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