Historical Document

Models 701 and 709 Variable Diode Function Generators

Single-page product brochure for the Comdyna Models 701 and 709 Variable Diode Function Generators (VDFG). The Model 701 features fixed breakpoints with adjustable slopes and 11 straight-line segments for approximating arbitrary non-linear curves, priced at $165; it includes an internal inverter amplifier so segments can be positive or negative, with functions generated across all four quadrants. The Model 709 extends the capability with both adjustable breakpoints and adjustable slopes, offering 5 positive and 5 negative breakpoints each adjustable anywhere within the full 10 V range, enabling 21 or more segment curve approximations, priced at $205.

Manufacturer: Comdyna
System: 701, 709
Type: Historical Document
Language: English
Learning track: machine reference
Pages: 1

701, 709
Comdyna
function generators
diode function generator
non-linear function approximation
analog computing peripherals

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MODELS 701 AND 709 VARIABLE DIODE FUNCTION GENERATORS MODEL 701 fixed breakpoints, adjustable slopes ° tno aE aa aaPONTS > 1e 3 oO Oe The 701 is the easy-to-set diode function generator that can be used with any 10 volt analog computer or re- lated system. Just patch it to your computer and it’s ready to generate arbitrary functions. Eleven straight line segments approximate non-linear curves. Included stand- ard is an internal inverter amplifier that lets curve seg- ments have either positive or negative slopes. Arbitrary functions are generated over a full four quadrants. The 701's easy to set features and low cost makes the unit excellent for student instruction. see. $165 . .. JUST PATCH TO YOUR SYSTEM The VDFG is programmed by connecting it to the summing junction of a high gain operational amplifier. When this amplifier has a resistor feedback. the VDFG function ‘appears as its output. Functions are conven: iently set through use of an oscilloscope disploy or XY plotter. For setting functions, a negative to positive ramp is made the input. (This romp is available as the normal Comdyna GP.6 time base sweep, or it may be programmed on other computers.) If the sweep is the ordinate and the VDFG amplifier output is the abeissa, the read-out display will show the input/output curve. In setting the function, first the parallex is adjusted to establish the curve’s position at the Y axis. Next, the center slope is set. Other segment slopes are then sct sequentially from the zero position. When the desired function is displayed, the sweep is replacd by the program input and the VDFG ts ready for operation. COMDYNA, Inc. MODEL 709 adjustable breakpoints, adjustable slopes Spee 20-660) Mele) or foMoM oom vost Similar in operation to the 701, the 709 VDFG expands the range of function generation through use of both variable breakpoints and variable slopes. The eleven curve segments are provided as five posilive and five negative breakpoints. Fach may be adjusted to any point within the full 10 volt range. As with the 701, an in- ternal inverter amplifier is provided so that individual segments may be of either positive or negative slope. Any number of 709 units may be slaved together for 21 or more segment curve approximation. we $205 FOR ARBITRARY NON-LINEAR FUNCTIONS SPECIFICATIONS Number of Segments Segment Slope (Typical w/SOK feedback) « Porallex Adjustment. Power Requirements . Physical Dimensions . « plus & minus reference (10 to 154 by FYING COMPUTERS FOR DYNAMIC ANALYSIS 305 Devonshire Road, Barrington, Illinois 60010, (312) 381-7560