Page 198 - The Art and Science of Analog Circuit Design

Mm Williams

SHORT WIRE DIRECTLY
TO THIS BNC OUTPUT
Figure 11-A3.
75k to 3W
CARBON COMP High voltage RMS
calibrator is voltage
output version of
CCFL circuit.

C1 = MUST BE A LOW LOSS CAPACITOR.
METALIZED POLYCARB
WIMA FKP2 OR MKP-20 (GERMAN) RECOMMENDED
L1 = SUMIDA 6345-020 OR COtLTRONlCS CTX110092-1
PIN NUMBERS SHOWN FOR COILTRONICS UNIT
12 = COILTRONICS CTX300-4
Q1, 02 = AS SHOWN OR BCP 56 (PHILLIPS SO PACKAGE)
* = 1% FILM RESISTOR (10kQ TO 75kQ RESISTORS IN SERIES)
00 NOT SUBSTITUTE COMPONENTS
COILTRONICS (305) 781-8900, SUMIDA (708) 956-0666
calibrator box output before and after every set of efficiency measure-
ments. This is done by directly connecting, via BNC adapters, the calibra-
tor box to the RMS voltmeter on the 1000V range.

The efficiency measurements require an RMS responding voltmeter. This
instrument must respond accurately at high frequency to irregular and
harmonically loaded waveforms. These considerations eliminate almost
all AC voltmeters, including DVMs with AC ranges.
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