that2151 THAT Corporation, that2151 Datasheet
that2151
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that2151 Summary of contents
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... BIAS CURRENT COMPENSATION 1 6 Figure 1. 2150 Series Equivalent Circuit Diagram dbx is a registered trademark of Carillon Electronics Corporation THAT Corporation; 734 Forest Street; Marlborough, Massachusetts 01752; USA Tel: (508) 229-2500; Fax: (508) 229-2590; Web: http://www.thatcorp.com IC Voltage-Controlled THAT 2151, 2150A, 2155 APPLICATIONS • ...
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... Unless otherwise noted =25˚ +15V -15V. Test circuit is as shown in Figure 3. SYM ADJ is ad- justed for minimum THD @ kHz gain. THAT Corporation; 734 Forest Street; Marlborough, Massachusetts 01752; USA Tel: (508) 229-2500; Fax: (508) 229-2590; Web: http://www.thatcorp.com ...
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... SYM V Gain Control Voltage E C– INPUT 10u 20k Figure 4. Frequency Response Vs. Gain (2150A) THAT Corporation; 734 Forest Street; Marlborough, Massachusetts 01752; USA Tel: (508) 229-2500; Fax: (508) 229-2590; Web: http://www.thatcorp.com 2151 2150A Min Typ Max Min — 0.004 0.02 — ...
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... where V is the voltage at the junction of D3 and D4; 3 THAT Corporation; 734 Forest Street; Marlborough, Massachusetts 01752; USA Tel: (508) 229-2500; Fax: (508) 229-2590; Web: http://www.thatcorp.com Theory of Operation V is the thermal voltage, T rent of Q3; and I Q3 assumed that D3 matches Q3 (and will be as- sumed that they match Q4 and D4, as well) ...
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... A) is the dominant noise source in the 2150 Series VCAs. THAT Corporation; 734 Forest Street; Marlborough, Massachusetts 01752; USA Tel: (508) 229-2500; Fax: (508) 229-2590; Web: http://www.thatcorp.com Transistor Matching ...
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... Of course, this good performance can be negated current supplied from outside the VCA. To pre- THAT Corporation; 734 Forest Street; Marlborough, Massachusetts 01752; USA Tel: (508) 229-2500; Fax: (508) 229-2590; Web: http://www.thatcorp.com vent such dc terms, ac input coupling is strongly rec- ommended ...
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... Q3/D3) are fixed, low values for the input resistor will require more closed-loop gain from the opamp. Since THAT Corporation; 734 Forest Street; Marlborough, Massachusetts 01752; USA Tel: (508) 229-2500; Fax: (508) 229-2590; Web: http://www.thatcorp.com Figure 11. 1kHz THD+Noise Vs. Level Gain ...
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... As mentioned before, THAT Corporation; 734 Forest Street; Marlborough, Massachusetts 01752; USA Tel: (508) 229-2500; Fax: (508) 229-2590; Web: http://www.thatcorp.com this source must supply the sum of the input and out- put signal currents, plus the bias to run the rest of the IC ...
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... Differential control drive avoids the large dc levels oth- INPUT 10u Figure 14. Positive Control Port Using Pins 2 and 4 THAT Corporation; 734 Forest Street; Marlborough, Massachusetts 01752; USA Tel: (508) 229-2500; Fax: (508) 229-2590; Web: http://www.thatcorp.com mis- erwise required BE (+610 mV for -100 dB gain at pin 3 alone, vs ...
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... Figure 15. Using Both Control Ports (Differential Drive) THAT Corporation; 734 Forest Street; Marlborough, Massachusetts 01752; USA Tel: (508) 229-2500; Fax: (508) 229-2590; Web: http://www.thatcorp.com To avoid excessive noise, one must take care to use quiet electronics throughout the control-voltage cir- cuitry. One useful technique is to process control volt- ages at a multiple of the eventual control constant (e.g., 61 mV/dB — ...