Published:2009/7/20 21:58:00 Author:Jessie
SECAM system uses time multiplexing of two chrominance signals, transmitted sequentially, with one-line memory in receiver circuit.-R. Chaste, P. Cassagne, and M. Colas, Sequential Receivers for French Color Tv System, Electronics, 33:19, p 57-60. (View)
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Published:2009/7/20 22:21:00 Author:Jessie
10.7 MHz IF amplifier using a 3N204 dual-gate MOSFET (courtesy Texas Instruments Incorporated). (View)
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Published:2009/7/20 22:21:00 Author:Jessie
Three-stage amplifier has forward agc on first stage Q1. Sound trap at 41.25 Mc before detection prevents 900-Mc beat between color subcarrier and sound carrier. -D. Bray, Solid State Makes Debut in Big-Screen Color Tv, Electronics, 39:8, p 99- 105. (View)
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Published:2009/7/20 22:19:00 Author:Jessie
105 MHz to 10.7 MHz converter using a 3N225 dual-gate MOSFET (courtesyTexas Instruments Incorporated). (View)
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Published:2009/7/20 22:19:00 Author:Jessie
Burst amplifier Q20 and 3.58-Mc crystal oscillator Q21 are driven by output of 0rst stage of chroma amplifier of transistorized color tv. Amplifier burst locks oscillator frequency to subcarrier frequency required by color demodulators, and provides reference burst for automatic color control circuit.-D. Bray, Solid State Makes Debut in Big4creen Color Tv, Electronics, 39:8, p 99-105. (View)
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Published:2009/7/20 22:18:00 Author:Jessie
Uses passive fiber to separate color subcarrier frequency front sync burst, along with injection-locked oscillator that combines amplitude limiting and power amplification for direct drive of color demodulators.-I. N. Moth, Locked Oscillator for Color Tv, Electronics, 32:39, p 91-92. (View)
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Published:2009/7/20 22:17:00 Author:Jessie
Used in automatic video-processing amplifier that instantly compensates for wide variations in color or monochrome input signal levels, to maintain output signal components al correct levels.-J. O. Schroeder, Holding Video Levels While Switching Studios, Electronics, 32:22, p 96-98. (View)
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Published:2009/7/20 22:17:00 Author:Jessie
Supplies bias voltage to r-f and video i-f stages of color set using transistors in all but deflection and recliner stages, to maintain video output amplitude at about 3 v.-D. Bray, Solid State Makes Debut in Big-Screen Color Tv, Electronics, 39:8, p 99-105 (View)
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Published:2009/7/20 22:16:00 Author:Jessie
10.7 MHz to 455 kHz mixer for CB operation using a TIS148 dual-gate MOSFET (courtesy Texas Instruments Incorporated). (View)
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Published:2009/7/20 22:12:00 Author:Jessie
Used in afc system that locks 2,000-Mc klystron to crystal oscillator reference frequency. Receiving-tube multipliers provide 50 mw at 500 Mc, and silicon crystal diode quadruples this to give 0.25 mw ct 2,000 Mc. Used in mobile microwave relay system for color tv pickups.-T. G. Custin and J. Smith, Relay System Diplexes Audio and Color Video, Electronics, 31:25, p 64-67. (View)
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Published:2009/7/20 22:11:00 Author:Jessie
Fourth section of DG201 quad CM0S analog switch provides cancellation of coupled charges (glitches), to keep sample-and-hold offset below 5 mV over analog voltage range of -10 V to +10 V. Acquisition time is 25μs for opamp shown but can be im-proved by using faster-slewing opamp. Aperture time is typically 1 ps- Analog Switches and Their Applications, Silliconix, Santa Clara,CA,1976,p 7-68. (View)
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Published:2009/7/20 22:10:00 Author:Jessie
Provides bandwidth of 2 Mc, with 200.v output, for color set having transistors in all except defection and rectifier circuits. Brightness is controlled by shifting base bias voltage of Q12, and contrast by varying ac emitter impedance of Q12.-D. Bray, Solid State Makes Debut in Big-Screen Color Tv, Electronics, 39:8, p 99-105. (View)
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Published:2009/7/20 22:09:00 Author:Jessie
Improves stability of hue, saturation, noise, and pull in characteristics of received color tv signals. Low-frequency diode gate corrects subcarrier oscillator phase from synchronous demodulator signals and establishes signal level for a chromo control circuit.-Z. Wiencek, Automatic Controls for Color Television, Electronics, 32:20, p 58-59. (View)
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Published:2009/7/20 22:08:00 Author:Jessie
Amplitude of 4.5-Mc intercarrier sound signal controls sound-to-picture ratio to provide automatic lne tuning. Automatic control of beats between picture harmonics and sound carrier closely approximates manual tuning. Circuit is particularly valuable for remote control of color tv sets. -C. W. Bough, Jr., and L. J. Sienkiewicz, Sound Signal Tunes Tv Automatically, Electronics, 31:17, p 54-58. (View)
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Published:2009/7/20 22:07:00 Author:Jessie
Used with visual f-m transmitter for microwave ralay. Klystron locks to crystal i-f difference frequency to provide required high degree of stability. Calibrated wavetrap modifies sawtooth waveshape of afc to provide internal frequency monitoring. -T .-G. Custin and J. Smith, Relay System Diplexes Audio and Color Video, Electronics, 31:25, p 64-67 (View)
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Published:2009/7/20 21:42:00 Author:Jessie
Strobe pulse developed from logic input of 531 opamp IC, turns on JFET Q1 to complete feedback loop to IC1, Q1, and Q2. C1 charges to voltage equal to that of input signal plus gate-to-source offset voltage of Q2. At end of strobe time, feedback loop is broken and C, holds voltage until time of next strobe pulse. Decay in output voltage between samplings is 1mV/s.- Signetics Analog Data Manual, Signetics, Sunnyvale, CA, 1977, p 643-644. (View)
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Published:2009/7/20 22:34:00 Author:Jessie
105 MHz gate-2-contralled RF amplifier using a TIS152 dual-gate MOSFET This circuit has been optimized for third-order intermodulation distortion(courtesy Texas Instruments Incorporated). (View)
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Published:2009/7/20 22:31:00 Author:Jessie
118 to 136 MHz broadband RF amplifier using a 2N6083 bipolar transistor. This circuit is ideal for mobile operation since the recommended supply voltage is 12.5 volts. It provides 30 watts output for a 4-watt input at 125 MHz (courtesy Motorola Semiconductor Products Inc.). (View)
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Published:2009/7/20 22:28:00 Author:Jessie
105 MHz to 10.7 MHz mixer using a TIS152 dual-gate MOSFET (courtesy Texas Instruments Incorporated). (View)
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Published:2009/7/20 22:22:00 Author:Jessie
4-digit CMOS gas discharge display (courtesy Motorola Semiconductor Products Inc.). (View)
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