CHARACTERISTIC SWITCHING CIRCUIT

The capacitor (5) has one terminal earthed and the other connected to the switching contact of a switch device (25). An additional switching device (29) is connected between the common contact of the first switch device (25) and earth through a fixed capacitor (28). The arrangement is said to avoid...

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Bibliographic Details
Main Authors KOBORI YASUNORI, ITOIGAWA KEIICHI, FUKUSHIMA ISAO, KUWAHARA KAZUYOSHI, NISHIJIMA HIDEO
Format Patent
LanguageEnglish
Korean
Published 08.10.1990
Edition5
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
PICTORIAL COMMUNICATION, e.g. TELEVISION
RESONATORS
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Summary:The capacitor (5) has one terminal earthed and the other connected to the switching contact of a switch device (25). An additional switching device (29) is connected between the common contact of the first switch device (25) and earth through a fixed capacitor (28). The arrangement is said to avoid the formation of parasitic capacitances, when the circuit is integrated. Alternatively, the time constant can be varied widely by the provision of a large capacitor external to the integrated circuit. A switching capacitor is added for switching the characteristics of time-constant circuit combined with a fixed capacitor. The time constant-determining circuit has a low-pass filter which is switched by a combination of switched capacitors and capacitances.
Bibliography:Application Number: KR19830001444