The FET shown in Figure 9-32 has the y-parameter specifications shown in Figure 9-31. 1. Draw the y-parameter equivalent circuit of the FET at f = 100 MHz, assuming that VGS = 0 and VDS = 15 V. 2. Find the values of Cg Cg H and Cds under the same conditions as (1), given…
A second letter is added to the subscript of the symbol for an FET y parameter to indicate the configuration for which it applies: s for common source, II for common drain, and g {or common gate. The common-source y parameters warp those most frequently given in specifications. These are summarized in Table 9-4. The…
Figure 9-2 X shows a y-parametric lot”adjectival circuit that can be substituted fur any network or electronic device whose y-paramountcy values arc known. Notice that we have shown impedance blocks on the diagram. in keeping with the usual practice of representing impedance on a schematic diagram. In many books these blocks are labeled y; and y,,,…
Tile y parameters of “two-port network (Figure 9- t) are derived from the following equations: Note that each term in each equation must represent a current, since the left side of each equation is- a current. Therefore. each of the parameters y Y12, Y210 and must be an admittance; Y parameters are also called admittance parameters.…
Tile y parameters of “two-port network (Figure 9- t) are derived from the following equations: . ;1 = y VI + Y12l ;2 = Y~IVI + YnV2 (9-57) Note that each term in each equation must represent a current, since the left side of each equation is- a current. Therefore. each of the parameters y”, Y12,…
Common-Collector and Common-Base Amplifiers Figure 9-22 shows CC and CB amplifiers and their hybrid equivalent circuits. the general gain and impedance equations we derived in Section 9-3 are app 9 these configurations, with the usual modifications to reflect the presence of ext bias resistors.T in the common-collector amplifier .shown in Figure 9-23 has the following” parameters:…
Common-Emitter Amplifiers Figure 9-18 how a common-emitter amplifier that is biased using the voltage divider method. Also shown is the small-signal equivalent circuit that resale when the transistor is replaced by its hybrid model. The gain and impedance equations we have already derived are applicable to this circuit, with a few minor modifications. Notice that…
TRANSISTOR h PARAMETERS Bipolar transistor specifications often include h-parameter values (Se Figure 4 and these values are frequently used in the design and analysis of IT a circuits Field effect-transistor specifications more often include y-param Cr we as which we- will discuss later in the chapter.Since there are three possible BJT configurations (CE. CC. and…
If the parameters of a circuit are known then it is possible to construct another circuit that 1. has a current source and a voltage source (whose values are determined by the known h-parchment values and 2. is entirely equivalent to the original circuit. Figure 9-9 shows the hybrid equivalent circuit that can be substituted…
The value of can be found in Figure 9-6 by recognizing that it equals the output conductance of the network, that is, the reciprocal of the resistance looking into the output terminals, Since one side of the 60-0 resistor is open-circuited, the output resistance is clearly 40 0, and Find the h parameters of the network…
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