Capacitance membrane switchcore with intertrace capacitive coupl

Details Capacitance membrane switchcore with intertrace capacitive coupl Capacitance membrane switchcore with intertrace capacitive coupl

1988-10-25

1989-08-15

Scott, J. R.

Electricity: circuit makers and breakers

Capacitive switch

341 33, H03K 17975, H03M 1100

Patent

active

048576840

ABSTRACT:
A capacitance membrane switchcore (12,12a, 12b, 12c, 12c') including a first circuit (16, 16'), a second circuit (17,17') and a third circuit (49,49') in which intertrace coupling capacitors (58,58') couple conductive traces (40-47,135) of the second circuit (17,17') to conductive traces (51,51') of the third circuit (49,49'). Also disclosed is a capacitance membrane switchcore (12) including a first circuit (16) having at least one trace (65) with a first branch (65a) along a first surface (18a ) of a dielectric layer (18), a second branch (65b) along a second surface (18b) of the dielectric layer (18), an intratrace coupling capacitor (66,67) coupling the first branch (65a) to the second branch (65b), a third branch (65c) along the first surface (18a) of the dielectric layer (18), and an intratrace coupling capacitor (68,69) coupling the second branch (65b) to the third branch (65c).

REFERENCES:
patent: 4400758 (1983-08-01), Frame
patent: 4562315 (1985-12-01), Aufderheide
patent: 4736076 (1988-04-01), Mochizuki et al.
patent: 4803315 (1989-02-01), Kako et al.

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