Patent ID: 6798678
Filing Date: 2004-09-28
Classification: H03D,H03K,H03L,H04L

Abstract:
A frequency voltage converter comprising:a first transmission line comprised of one signal line which branches off from a signal line for transmitting an input signal corresponding to a modulated wave signal; a second transmission line comprised of the other signal line which branches off from said input signal transmitting signal line; a mixer circuit having a first input terminal connected to said first transmission line and a second input terminal connected to said second transmission line; a delay-amount variable first delay line circuit placed in said second transmission line between a portion where said first transmission line and said second transmission line branch off from each other and the second input terminal of said mixer circuit; a third transmission line comprised of one signal line which branches off from a signal line for transmitting a reference signal having a predetermined frequency; a fourth transmission line comprised of the other signal line which branches off from said reference signal transmitting signal line; a delay-amount variable second delay line circuit placed in said fourth transmission line between a portion where said third transmission line and said fourth transmission line branch off from each other and a portion where said third transmission line and said fourth transmission line are joined to each other; and delay amount control means connected to said third transmission line, said fourth transmission line, a control section of said first delay line circuit and a control section of said second delay line circuit and for outputting the same control signal to the control section of said second delay line circuit and the control section of said first delay line circuit so that the reference signal passing through said fourth transmission line is delayed by a predetermined cycle with respect to the reference signal passing through said third transmission line.