×

Capacitively coupled keypad structure

  • US 6,633,241 B2
  • Filed: 12/21/2000
  • Issued: 10/14/2003
  • Est. Priority Date: 12/28/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A keypad arrangement for an electronic device, comprising:

  • a keypad comprising activatable keys, input signal means for bringing an electric input signal to the keypad, signal conversion means for responding to a key activation by selectively converting the input signal into an electric output signal the value of which depends on the activated key, output signal detection means for detecting the value of the electric output signal, a first capacitive coupling between the input signal means and the signal conversion means, and a second capacitive coupling between the signal conversion means and the output signal detection means.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×