Title:
振幅-周波数領域を規定した弁別を行う混信検出回路
Document Type and Number:
Japanese Patent JP4059924
Kind Code:
B2
Abstract:
An interference detection circuit includes a circuit, in particular a non-linear circuit, for defining a discrimination curve in terms of instantaneous magnitude and instantaneous frequency, and a circuit, in particular a differential amplifier, for detecting whether a combination, in particular the product, of the instantaneous magnitude and the instantaneous frequency of the inputted signal exceeds the discrimination curve, in which case, a control circuit controls the gating of the inputted signal. The discrimination defining circuit has a control input for adapting the discrimination curve to the average instantaneous magnitude, in particular, the product of the instantaneous magnitude and the instantaneous frequency of the input signal. Thus, small as well as larger input signal amplitudes on which interference is superimposed can be discriminated adequately and reliably in order to minimize audible effects of leaving out interfered part of the input signal.
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| JPS5950139 | [Title of the device] Squelch circuit |
Inventors:
Kasperkovitz Wolf Dietrich Heolf
Kien Ally
Kien Ally
Application Number:
JP51442998A
Publication Date:
March 12, 2008
Filing Date:
July 15, 1997
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H04B1/10; H03G3/34
Domestic Patent References:
| JP3039951Y2 | ||||
| JP8017336B2 | ||||
| JP5244467A |
Attorney, Agent or Firm:
Kenji Sugimura
Eiji Fujiwara
Kosaku Sugimura
Hiroshi Tokunaga
Kazuaki Takami
Umemoto Masao
Eiji Fujiwara
Kosaku Sugimura
Hiroshi Tokunaga
Kazuaki Takami
Umemoto Masao