Abstract: The present invention includes two lines of PLL circuits. The first PLL circuit 31 includes a first voltage-controlled oscillator 34 that increases in oscillation frequency as a control voltage increases. The second PLL circuit 41 includes a second voltage-controlled oscillator 44 that decreases in oscillation frequency as a control voltage increases. A feedback voltage applied to the first voltage-controlled oscillator 34 is added to a feedback voltage applied to the second voltage controlled oscillator 44. The output signals of the two voltage-controlled oscillators 34, 44 are synthesized by a mixer 13, so that the transient responses of the first PLL circuit 31 and the second PLL circuit 41 cancel each other out. Thus, the transient response of the output signal of the mixer 13 becomes shorter.

Abstract: A rack assembly having a plurality of support posts, brackets extending from individual support posts, and a bracket rail extending between two or more brackets and capable of supporting goods. An outer plate portion of each support post is formed with a plurality of vertically spaced apart engagement holes. Each bracket has engaging projections adapted to be received into the engagement holes, engaging pawls extending from the respective engaging projections and engageable with respective edges of the engagement holes, and a plate portion abuttable to the outer surface of the support post. The bracket can be mounted to the support post by inserting the engaging projections into corresponding engagement holes at the erection site to allow the engaging pawls to engage the edge of the engagement holes. Simultaneously, the slip-off preventive projection of the bracket is inserted into the slip-off preventing hole in the side plate portion of the support post.