This paper deals with the problem of synthesizing a network with n-reactances and an associated necessary number of resistances which will have a transient response most nearly equal, in the least square sense, to a desired transient response when excited with some particular input voltage or current impulse. A method is derived for this synthesis in the cases for which the Laplace transform of the input impulse contains no poles or one pole at s=0. The significance of this method with relation to synthesis techniques based on steady-state considerations is discussed, and the method is illustrated for a simple case.
Ini a previou-s paper (1) aii iniexpeinsive integrating light recorder was described wlhich operated with currenit supplied fromii a tranlsformiier aild rectifier conniiected to ani ordinary alternatincg currenit linie. This paper describes a similar uilit in whieh batteries are used to supply etrrenlt. In both inistrumnents the miiinute cuirrenit froiii a phototube charges a condenser producinig a potenitial differeniee whielh gradually ilnereases. Wheni the potential across the condenser reaches the breakdowni voltaoe of a cold cathode relay tube in parallel with the conldelnser plates, the gras in the tube ioniizes discharoinoy the condenser anid at the samiie time dischargTing a larger coiidenser througlh a sensitive couinter. A direct currenit supply-is required to supply the phototube anid prov-ide the charge oni the condelnser which actuates the counter.In order to miiake the initeg,ratinlo lioht recorder portable for use uinider field conlditions, the originial eirctuit w-as slightly modified to use dry batteries as a souree of power. The eirecuit ( fig. 1)
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