JPS63128757U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a schematic top view showing an embodiment of a stray capacitance compensation circuit according to the present invention, and FIG. 2 is a longitudinal sectional view thereof.
Figure 3 is an equivalent circuit diagram of Figures 1 and 2, Figure 4 is an equivalent circuit diagram when Figure 3 is modeled as a lumped stray capacitance, and Figure 5 is an equivalent circuit diagram of Figure 4 with a certain constant. Figure 6 is an equivalent circuit diagram equivalent to Figure 4 before using this invention, Figure 7 is an equivalent circuit diagram of Figure 6 that is the same as Figure 5. A diagram showing an example of frequency characteristics of impedance when set to a constant. Figure 8 is an equivalent circuit diagram equivalent to Figure 4 when the coil is inserted at the input end side. Figure 9 is an equivalent circuit diagram of Figure 8. 6 is a diagram showing an example of frequency characteristics of impedance when set to the same constant as in FIG. 5. FIG. 1...First circuit terminal, 2...Wiring pattern,
3... Coil, 4... Second circuit terminal, 5, 6...
...Earth circuit, 7...Printed board.

Claims (1)

[Scope of utility model registration request] A printed board that includes a stray capacitance between a first circuit terminal that inputs an arbitrary signal, a second circuit terminal that terminates the signal, and a ground circuit that connects the first and second circuit terminals. 2. A stray capacitance compensation circuit characterized in that, in the wiring pattern, a coil having an inductance is inserted in the vicinity of the second circuit terminal and immediately after the wiring pattern in order to compensate for the stray capacitance.