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US 8,575,992 B2Granted
Switch
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsKouki Tanji, Eiichiro Otobe
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AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsKouki Tanji, Eiichiro Otobe
Estimating the term…
A switch is capable of performing switching, while reducing distortion with respect to amplitude of a high frequency signal. The switch includes: an input terminal to which a high frequency signal is input; a first switching unit connected between the input terminal and a first output terminal and selectively outputting the high frequency signal through the first output terminal; and a second switching unit connected between the input terminal and a second output terminal and selectively outputting the high frequency signal through the second output terminal. Each switching unit includes an impedance transformer installed on a signal line, a bipolar transistor having an emitter grounded, a collector connected to the signal line, and a base receiving current according to a control voltage applied thereto; and a bipolar transistor having a collector grounded, an emitter connected to the signal line, and a base receiving current according to the control voltage.
A switch comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Switching arrangements with several input- or output terminals: with several outputs only
Electronic switching or gating, i.e. not by contact-making and –breaking: modifications for eliminating interference voltages or currents
Transmit/receive switching: in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
Pulse technique
About 5 years 10 months of term left · ends 11 Sep 2032 (estimated)
This application claims the priority of Japanese Patent Application No. 2011-240564 filed on Nov. 1, 2011,in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.
1. Field of the Invention
The present invention relates to a switch.
The above and other aspects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic circuit diagram of a switch according to a first embodiment of the present invention;
FIG. 2A is a graph showing an effect obtained by including a fourth bipolar transistor in the switch according to the first embodiment of the present invention;
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Also, elements having the same functions and structures in the specification and the drawings will be denoted by the same reference numerals, and repeated descriptions thereof will be omitted.
Hereinafter, a single pole dual throw (SPDT) switch turned on or off via one input and two outputs will be described as a switch according to an embodiment of the present invention. In addition, while a SPDT switch having one input and two outputs is described for convenience of description, either terminal may be an input or an output. Also, the switch according to the embodiment of the present invention is not limited to being a SPDT switch. For example, a switch according to an embodiment of the present invention may be a single pole single throw (SPST) switch turned on or off via one input and one output or a switch turned on or off via one input and three or more outputs. A switch according to an embodiment of the present invention may be implemented as various switches including at least one first switching unit (or second switching unit) to be described later.
(First Embodiment)