HP HP-Bench-Briefs-1988-01-03 free download

File name HP-Bench-Briefs-1988-01-03.pdf

SERVICE INFORMATION FROM HEWLETT-PACKARD 1st Quarter 1988 Using Copper Tape to Fabricate RF Breadboard Circuits John Kristiansen Circuit Layout pattern; however, the preferred scale Hewlett-Packard for paper layout is 2:l. If it's not already done, the first Introduction step is to mark your schematic with The 2:l scale is easy to accomplish component reference designators, using 0.200 grid graph paper (some- Do you use insulated wire when connector pin numbers, test point times called "engineering notebook breadboarding your circuit boards? designations, etc., to identify all items paper), which is what I used for this Do you also use insulated wire for and components that will appear on article. Mark your sheet of graph high frequency circuits-for example, the layout (see Figure 1 for a simple paper with sequential numbers across above 50 MHz? At these higher fre- schematic). You can start the initial the top and down the side. As you quencies your wire begins to look layout by arranging a rough sketch lay your circuit out on the graph like an inductor, and the whole circuit of the circuitry to determine the most paper, each component lead (solder may start to oscillate at the slightest practical placement of components point) assumes a cross-reference disturbance. and traces. The next step is to adapt number. These cross-reference num- the sketch to a formal layout using a bers will be used for transferring the In this article I will describe another grid and a component template that layout from the paper to the bread- method of breadboarding RF circuits will establish very accurate conductor board so you know where to place using adhesive-backed copper tape. paths, component body outlines, board each component and the copper tape. Some of the advantages of using outline and all other features. The An example is shown in Figures 2 copper tape are: layout should be drawn as viewed and 3. from the component side of the The copper tape does not look like printed circuit board. The actual size A standard comDonent temdate is an inductor at high frequencies board layout is based on a 0.100 grid one of the most useful