Abstract: A power amplifying apparatus according to the present invention can provide a stable electric power output with wide range by controlling both of the output amplifier for amplifying the electric power and the pre-amplifier disposed at the front of the output amplifier. Furthermore, in order to avoid the disadvantage that a transmission spectrum is expanded because of no supply of a stable voltage to be supplied to the electric power amplifier, thereby producing a cross-talk, a stabilizing power source circuit is provided to stabilize the voltage between the power amplifier and the power source for supplying the voltage.

Abstract: Disclosed herein is a structure adapted to connect eye-glass parts to each other and comprising a small plate integrally extending from a main body of one eyeglass part which is made of a hardly solderable metal such as pure titanium or Ni-Ti base alloy. A connecting member made of an easily solderable metal has side walls and a cross section of U-shape defining a channel for receiving the small plate which has such constricted regions as formed at both sides surfaces of the small plate. The side walls of the connecting member are folded onto the inserted small plate such that inner surface material of said member are pressed into the constricted regions so as to be secured to said small plate. To the connecting member unseparably wound around the small plate, any other eyeglass part can be soldered or welded.

Abstract: A power amplifier system suitable for a mobile radio receiver/transmitter is described. A wave form signal to be transmitted is made smooth during its rise and fall times, thereby making it possible to prevent a transmission spectrum from expanding and interfering with the adjacent channels. The power amplifier system compares an envelope signal of an inputted RF signal and that of an RF signal to be outputted, whereby the power amplifier system as a whole provides linear amplification.

Abstract: In a linear amplifier circuit, an amplifier amplifies an input signal to produce an output signal, an input signal envelope detector detects the envelope of the input signal, and an output signal envelope detector detects the envelope of the output signal. The difference between the outputs of the envelope detectors is determined, and the amplifier is controlled in accordance with the difference so that the level of the output signal is linearly related to the input signal. Compensation circuits are provided for temperature compensation of the linearity in the characteristic of the envelope detectors.

Abstract: A power amplifying apparatus according to the present invention can provide a stable electric power output with wide range by controlling both of the output amplifier for amplifying the electric power and the pre-amplifier disposed at the front of the output amplifier. Furthermore, in order to avoid the disadvantage that a transmission spectrum is expanded because of no supply of a stable voltage to be supplied to the electric power amplifier, thereby producing a cross-talk, a stabilizing power source circuit is provided to stabilize the voltage between the power amplifier and the power source for supplying the voltage.

Abstract: Disclosed herein is an eyeglass frame member comprising a predetermined length of a rod-like material made of an alloy of super elasticity and shape-memory property, said material having a predetermined number of thin portions of a reduced diameter, the thin portions disposed at desired intervals at both sides of a middle section of said rod-like material, wherein connecting pieces made of a higher solderable metal are respectively fitted in or wound around the thin portions, the middle section being formed into a bridge, intermediate sections to which the connecting pieces are fixed being simultaneously formed into eyebrow portions to which rims for holding respective lenses are to be fixed, and end sections of the rod-like material being bent to form lugs extending rearwards.

Abstract: A glasses with bridges and temples which are fixed to lens frames, without depending upon deposition. Bridges and temples of this glasses can be changed easily according to one's taste because they are not deposited to lens frames but are fixed to lens frames through the medium of sleeves and other means.