Abstract: Disclosed are a virtual golf system, a virtual golf introduction image generation method, and a virtual golf player information calculation method capable of providing a separate introduction image showing two or more users so as to be comparable to each other through record information of a virtual golf game of each of a plurality of users who use the virtual golf system before the plurality of users access the system in order to play the virtual golf game, whereby it is possible to induce users' record competition in the virtual golf game and to provide the users with immersiveness and interest in the game.

Abstract: A method of manufacturing a liquid crystal display includes: forming a liquid crystal panel including two substrates and a liquid crystal layer interposed between the two substrates and irradiating light to the liquid crystal layer in a state in which a voltage is applied to the liquid crystal panel. The liquid crystal layer includes liquid crystal molecules and a reactive monomer, and the voltage applied to the liquid crystal panel is an AC voltage. The liquid crystal molecules are isotropic in a state that the voltage is not applied thereto and are anisotropic in a state that the voltage is applied thereto.

Abstract: The present invention relates to an equivalent circuit of a package ground terminal paddle which is used to mount a microwave integrated circuit, and more particularly, to an approximate equivalent circuit of the package ground terminal paddle by which the expressions of parasitic components can be easily expanded according to the number of gold wires that are down-bonded to the paddle, by introducing an equivalent circuit structure which takes the impedance component output from each terminal as one common impedance component and grounds the common impedance.

Abstract: A low noise amplifier of the present invention may be useful to a portable cellular phone or a microwave communication system, particularly to a monolithic circuit in which the amplifier includes an input impedance component consisting of capacitors and an inductor, two MESFETs in a cascade connection and a capacitor connected between the two MESFETs so as to enhance the stability of the amplifier when a node strapping a plurality of ground terminals of the amplifier is connected to an external circuit by means of a bonding wire.

Abstract: Disclosed is a switch circuit which has a depletion mode n-channel MOSFET which can be used in a circuit allowing only a positive voltage to be supplied thereto, comprising a first D-FET having a gate for receiving an input signal, a drain for outputting an output signal and a source; a first resistor connected between the drain of the first D-FET and a positive voltage source to bias the drain of the first D-FET; a second D-FET having a gate connected to an intermittence controlling voltage source, a drain and a source connected to the positive voltage source and the source of the first D-FET 201, respectively; a second resistor connected between the gate of the second D-FET and a ground to bias the gate of the second D-FET; a constant-current source connected between each of the sources of the first and second D-FET and the ground; a bypass capacitor connected in parallel with the constant-current source and between the drain of the constant-current source and the ground to bypass an RF signal to the ground