Published:2009/7/20 20:49:00 Author:Jessie
Positive switching regulator(5 volts) using an ECG915 or ECG915D. For a ±5% fixed output R1 is 1.15 ohms and R2 is 4.99 ohms. For metal can applications where Vz is required connect a 6.2-volt zener in series with the regulated output (courtesy GTE Sylvania Incorporated). (View)
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Published:2009/7/20 21:03:00 Author:Jessie
Air exhaled by patient is sampled and analyzed for carbon dioxide concentration by commercial infrared analyzer that provides electrical output proportional to amount of carbon dioxide. Analyzer output charges C2 to level dependent on carbon dioxide concentration. Comparison circuit controls relays K2 and K3 so iron lung bleeder valve keeps concentration within preset limits. V5, V6, and K2 establish upper limitV7, other half of V6, and K3 establish lower limit.-Control Regulates Iron Lung, Electronics, 31:41, p 108. (View)
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Published:2009/7/20 21:03:00 Author:Jessie
Two-component precision current limiter (courtesy Analog Devices, Inc.). (View)
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Published:2009/7/20 21:01:00 Author:Jessie
Amplifier, modulator, and oscillator produce 37.7-Mc signals frequency-modulated by scalp voltages of epileptics. Radiated signal may be picked up by antenna of receiver at distances up to 40 feet from patient in observation room.-C. L. Yeager and J. Henderson, Jr., Unit Telemeters Scalp Voltages, Electronics, 31:29, p 86. (View)
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Published:2009/7/20 21:01:00 Author:Jessie
Four identical AF102 stages amplify pulse output of delta modulator in tv waveguide link.-C. Kramer and J. C. Balder, Delta-Modulated Television Waveguide Link, Electronics, 36:31, p 50-52.
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Published:2009/7/20 21:00:00 Author:Jessie
Control binary Q6-07 is triggered on through diode AAZ18 and reset by Q8 whose conduction threshold is determined by R1. Settings of R1, R2, and RC control closing of artificial hand and strength of grip. Servo amplifier drives motor in hand and follow-up potentiometer.-G. W.Horn, Muscle Voltage Moves Artificial Hand, Electronics, 36:41, p 34-36. (View)
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Published:2009/7/20 21:00:00 Author:Jessie
Diffused-base mesa transistors permit design of tv tuners with noise performance equal to that of tube tuners. Article gives complete design procedure for r-f amplifier, mixer, and oscillator stages.-H. F. Cooke, Designing Tv Tuners with Mesa Transistors, Electronics, 33:15, p 64-69. (View)
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Published:2009/7/20 21:00:00 Author:Jessie
Precision voltage-controlled current source using an op amp and two FETs (courtesy Burr-Brown Research Corporation). (View)
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Published:2009/7/20 20:59:00 Author:Jessie
Adjustable output regulators for 5, 6, 12, 15, or 24 volts. The input capacitor is valued at 0.33 pF if Mylar or tantalum; if aluminum, it should be 1.0 pF or larger. Although the circuit shown is for a 7-volt output, voltages of 8, 14, 17, or 26 volts can be obtained by substituting ECG962, ECG966, ECG968 or ECG972, respectively, for the ECG960. These devices are three-terminal 1-ampere devices. The minimum voltage obtainable is 2 volts greater than the regulator voltage (courtesy GTE Sylvania Incorporated). (View)
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Published:2009/7/20 20:59:00 Author:Jessie
Uses single tetrode transistor in oscillator to feed four-diode balanced modulator. Peak level of modulator output is 4 db below 1 mw.-L. G. Schimpf, Carrier Transmission for Closed-Circuit Television, Electronics, 32:24, p 66-68. (View)
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Published:2009/7/20 20:59:00 Author:Jessie
Drives anesthetic pump servomotor in response to signals from electroencephalograph that continuously monitors border of wakefulness of patient undergoing surgical operation Anesthetic is supplied at fixed level, proportion to cortical activity of brain,-How Electronics Controls Depth of Anesthesia Electronics, 32;5,p 43-45. (View)
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Published:2009/7/20 20:59:00 Author:Jessie
CCTV REPEATER POWER SUPPLY-Operates from 24.v battery at transmitting terminal. C1 isolates battery voltage from terminal equipment, and L1 prevents shorting of signal. Two 7-v zener diodes in series serve as voltage regulators.-L. G. Schimpf, Carrier Transmission for Closed-Circuit Television, Electronics, 32:24, p 66-68.
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Published:2009/7/20 20:58:00 Author:Jessie
Two-transistor circuit provides high ratio of reverse to for. ward base drive. Oscillator current is 0.12 amp, output-stage current 0.72 amp, und push-pull yoke current is 11 amp.-M. Fischman, Transistorized Horizontal Deflection for Television, Electronics, 32:33, p 60-63. (View)
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Published:2009/7/20 21:13:00 Author:Jessie
RCA CA3080A oporational trans conductance amplifier feeds CA3130 to give amplification of sampled signal. Input voltage is sampled for duration of strobe pulse and held for readout.- Linear Integrated Circuits and MOS/FET's, RCA Solid State Division,Somerville,NJ,1977,P165-170. (View)
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Published:2009/7/20 21:12:00 Author:Jessie
Supplies pulses that drive heart at desired rate. Output is connected to heart muscles by small wires. Frequency of relaxation oscillator is controlled, between 50, and 200 ppm, by R2.-L. D. Trump and R. L. Skinner, Simple Heart Pacer is Highly Reliable, Electronics, 32:39, p 92-93. (View)
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Published:2009/7/20 21:12:00 Author:Jessie
Differential input amplifier Q1-02 accepts myoelectric signals of 10 to 1,000 microvolts from stump muscles of amputee. Stagger-tuned interstage trans-formers for Q3-Q4 give bandwidth of 100to 1,000 cps +or main amplifier that drives integrating detector Q5 that operates relay to control servomotor for artificial hand.-G. W. Horn, Muscle Voltage Moves Artificial Hand, Electronics, 36:41, p 34-36. (View)
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Published:2009/7/20 21:11:00 Author:Jessie
Cost of sample-and-hold circuits is reduced by using high slew rate only during sample period. Programmable μA776 opamp permits switching from high rate requiring 50-nA input bias current to holding amplifier mode requiring only 750-pA input bias current. Output level is held constant within 1% for about 2 s, making circuit ideal for digital readouts.-M. K. Vander Kooi, Low Cost Sample-and-Hold Circuit, EDN/EEE Magazine, Nov.1,1971, p 46. (View)
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Published:2009/7/20 21:10:00 Author:Jessie
Senses arterial pressure and differentiates pressure signal to eliminate mean pressure and produce required sharp spike at beginning of each pressure pulse. Spikes ore used to control regulator that delivers pulses to vagus nerve that controls muscles of heart.-R. L. Skinner, D. X. Gehmlich, and F. W. Longson, Blood Pressure and Heart Rate Regulator, Electronics, 32:1, p 38-41. (View)
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Published:2009/7/20 21:09:00 Author:Jessie
Positive floating regulator (50 volts) using an ECG915 or ECG915D IC. For a ±5% fixed output R1 is 3.57 ohms and R2 is 48.7 ohms. For metal can applications where Vz is required, an external 6.2-volt zener should be connected in series with the regulated output (courtesy GTE Sylvania Incorporated). (View)
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Published:2009/7/20 21:09:00 Author:Jessie
Current comparator with low input impedance using an AD7570 10-bit A/D converter (courtesy Analog Devices, Inc.). (View)
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