Preliminary Information
MH88632
MH88632
24
Z2
NC
MH88632
24
Z2
NC
23
Z1
22
Z900
NC
32
Z600
Z1 23
22
Z900
32
Z600
NC
Input impedance (Zin) set to 600Ω
Note: Make connection between Z1 and other points as short as possible
Input Impedance (Zin) set to 900Ω
Figure 4 - Input Impedance (Zin) Settings with Zin equal to 600 or 900Ω
MH88632
24
Z2
Z1 23
22
Z900
Z600 32
10 x Zin
Notes:
1) The 10xZin network must be set to 10 x the desired input impedance (Zin).
2) The network balance must be set to the desired network balance. (See
section on network balance.)
3) Make connection between Z1 and component as short as possible.
RP
Z2
CP
Z1
RS
Zin = 0.1 x
1
RS+ 1/RP + S x CP
where S = j x w
and w = 2 x Π x f
Example:
If RS = 2200Ω, RP = 8200Ω, CP= 11.5nf
Then the input impedance (Zin) is 220Ω in
series with 820Ω in parallel with 115nF.
Figure 5 - Input Impedance (Zin) Settings with Zin not equal to 600 to 900Ω
2-245