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, Y210 and must be an admittance; Y parameters are also called admittance parameters. The defining equation Cor each Y parameter is obtained from the network equations (9-56) or (9-57) following a procedure similar to that used to obtain II-parameter definitions. Setting V2 = 0 in equation 9-56 gives YII = 0 Siemens 1 V2- .v is called the short-circuit input t1(collie, since it is the admittance at the input terminals when the output is short-circuited. With Vl = O.Y can be obtained (rom equation 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, Y210 and must be an admittance; Y parameters are also called admittance parameters. The defining equation Cor each Y parameter is obtained from the network equations (9-56) or (9-57) following a procedure similar to that used to obtain II-parameter definitions. Setting V2 = 0 in equation 9-56 gives YII = 0 Siemens 1 V2- .v is called the short-circuit input t1(collie, since it is the admittance at the input terminals when the output is short-circuited. With Vl = O.Yll can be obtained (ROM equation 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, Y210 and must be an admittance; Y parameters are also called admittance parameters. The defining equation Cor each Y parameter is obtained from the network equations (9-56) or (9-57) following a procedure similar to that used to obtain II-parameter definitions. Setting V2 = 0 in equation 9-56 gives YII = 0 Siemens 1 V2- .v is called the short-circuit input t1(collie, since it is the admittance at the input terminals when the output is short-circuited. With Vl = O.Y can be obtained (rom equation 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, Y210 and must be an admittance; Y parameters are also called admittance parameters. The defining equation Cor each Y parameter is obtained from the network equations (9-56) or (9-57) following a procedure similar to that used to obtain II-parameter definitions. Setting V2 = 0 in equation 9-56 gives YII = 0 Siemens 1 V2- .v is called the short-circuit input t1(collie, since it is the admittance at the input terminals when the output is short-circuited. With Vl = O.Yll can be obtained (ROM equation 9-57: