JPH01135763U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a top view of one embodiment of the present invention when stray capacitance between patterns is compensated using a wire with inductance, Fig. 2 is a vertical cross-sectional view thereof, and Fig. 3 is an equivalent circuit diagram of this embodiment. , Figure 4 is an equivalent circuit diagram when Figure 3 is modeled as a lumped stray capacitance, Figure 5 is an example of the frequency characteristic of impedance when the equivalent circuit in Figure 4 is set to a certain constant, Figure 6 is an equivalent circuit diagram before using this example, Figure 7 is an example of the frequency characteristic of impedance when the equivalent circuit in Figure 6 is set to the same constant as in Figure 5, and Figure 8 is the equivalent circuit diagram in this example. Unlike the example, FIG. 9 is an equivalent circuit diagram when an inductance is inserted. FIG. 9 is a diagram showing an example of frequency characteristics of impedance when the equivalent circuit of FIG. 8 is set to the same constant as FIG. 5. 1, 31, 41, 61, 81... Input circuit terminal, 2, 32, 42, 62, 82... Circuit wiring pattern, 3, 4... Wire connection circuit terminal, 5, 34,
44, 64, 84... Termination circuit terminal, 6, 36,
46, 86... Wire rod, 17... Earth circuit, 18
...Printed board, 35-39, 45, 65, 85
...Capacitor.

Claims (1)

[Scope of utility model registration request] It is possible to run a wiring pattern that includes stray capacitance between the first circuit terminal that inputs any signal and the ground circuit connected to that circuit terminal, and a wire that has inductance connected to that wiring pattern. a first hole or terminal, a second circuit terminal that is not directly connected on the printed board but has a function of terminating the signal input to the first circuit terminal, and in the vicinity of the second circuit terminal, It has a second hole or terminal connected to the second circuit terminal and through which the wire having the inductance can be passed, and the wire having the inductance is processed to have an appropriate inductance, and the wire having the inductance is processed to have an appropriate inductance. By connecting the second hole or terminal, the stray capacitance of the wiring pattern is compensated for in terms of impedance characteristics in a certain frequency band, and the first and second circuit terminals are also maintained. Stray capacitance compensation printed board.