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- W3146056255 abstract "The output characteristics of insulated gate transistors (IGT's) are shown to be determined by the variation in the gain of the wide-base transistor in the device structure. Improvements in differential output resistance can be achieved by either decreasing the lifetime, as demonstrated in this paper by using electron irradiation, or by using a punchthrough base design, HE insulated gate transistor (IGT) belongs in the class of power semiconductor devices which exhibit current saturation with increasing output voltage. Other power devices which belong in this category are power MOSFET's and bipolar transistors. It is customary to characterize these devices in terms of their output resistance. A high output resistance is desirable when using these devices in circuits for performing either current limiting or when switching an inductive load. In the case of a power bipolar transistor, the output characteristics are determined by the design of the base region. These devices are usually fabricated with a narrow-base region in order to maintain a high current gain. An extended drift region is used to support the high collector voltage. Despite this design, the depletion layer of the base-collector junction does extend on the more-heavily doped (diffused) side leading to a reduction of the output resistance (l). In contrast, the drain output resistance of the power MOSFET is determined by the channel region. In this case, a reduction of the effective channel length has been shown to reduce the output resistance 121 Although many papers have been published dealing with the analysis of the on-state and switching behavior of IGT's (3)- (6), an analysis of the output characteristics has not been reported. Such an analysis is useful for identifying the device parameters that determine the shape of the output characteris- tics. This is important because the observed output resistance of IGT's can be very low as illustrated in Fig. 1, which shows a photograph of the typical output characteristics of three 600- V IGT's. The three traces were obtained by taking three identical IGT chips and irradiating them to doses of 1, 4, and 16 Mrad using 3-MeV electrons. Note the low output resistance for the 1-Mrad device. The output resistance increases with increasing radiation dose." @default.
- W3146056255 created "2021-04-13" @default.
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- W3146056255 date "1986-01-01" @default.
- W3146056255 modified "2023-09-24" @default.
- W3146056255 title "Analysis of the Output Conductance of Insulated Gate Transistors" @default.
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- W3146056255 hasPublicationYear "1986" @default.
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