CA3126 Intersil Corporation, CA3126 Datasheet
CA3126
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CA3126 Summary of contents
Page 1
... CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. © Copyright Harris Corporation 1999 Description The Harris CA3126 is a monolithic silicon integrated circuit designed for TV chroma processing and is ideally suited for NTSC color graphic applications that require subcarrier regeneration of the color burst signal. Part Number Information ...
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... Except for pull-in range testing, tune oscillator trimmer capacitor for free running frequency of 3.579545MHz 10Hz. 4. Set Switch 1 to Position 2, detune oscillator 250Hz, set Switch 1 to Position 1, and check for oscillator pull-in. 5. Set Chroma Gain Control to minimum position (CCW). CA3126 Thermal Information Thermal Resistance (Typical, Note 1) PDIP Package ...
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... Pin numbers refer to the PDIP package. (A) Chroma input signal (B) Key pulse input signal CA3126 +24V 270 2N2102 0. 0. CA3126 680 10pF 20pF 0.01 F 0.01 F NPO N750 XTAL 3.579545MHz VARIABLE TEST SIGNAL ATTENUATOR GENERATOR 2.5 s (A) 3.579545MHz BURST ...
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... AMPL. CHROMA GAIN CONTROL 50k 2 F CCW 1.2k KILLER FILTER ACC AMPL. 5 GND CA3126 NOTES: 6. Optional design features. 7. Pinout numbers refer to the PDIP package. CA3126 TV CHROMA PROCESSOR AFPC 0.01 F FILTER 1.0 F CRYSTAL 2k xx FILTER xx 0.01 F 680 SIGNAL SAMPLE AND HOLD DC CONTR. ...
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... GAIN 67 CONTROL 300 OVERLOAD R 41 DETECTOR 330 D 3 OVERLOAD DETECTOR NOTE: Pin numbers refer to the PDIP Package. Resistance values are in ohms. CA3126 4 AFPC DETECTOR 1. 2.1K 5pF ...
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... Q 75 KEYER 2.94K 1. 1. HORIZONTAL 9 KEYING INPUT CA3126 XTAL FILTER BIAS SAMPLE LIMITER AMPLIFIER AND HOLD 390 430 ...
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... The following paragraphs briefly describe the circuit operation of the CA3126 (shown in the Block Diagram and Schematic Diagram). A detailed description of the operation of various portions of the CA3126 is given in AN6247, “Application of the CA3126 Chroma-Processing lC Using Sample-and-Hold Techniques”. The chroma input is applied to Terminal 1 through the desired band-shaping network. A 2,450 resistor should be placed in series with Terminal 1 to minimize oscillator pickup in the fi ...
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... IN Hz FROM 3.579545MHz) FIGURE 2. STATIC PHASE ERROR Thermal Considerations The circuit of the CA3126 is thermally compensated to achieve the optimal operating characteristics over the normal operating temperature range of TV receivers. Figures 3 and 4 show the oscillator and chroma-output amplitudes and phases as a func- tion of temperature (Terminals 8 and 15), respectively ...
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... 2.4k COMPOSITE 0.01 F VIDEO/CHROMA INPUT 1 11.2V ZENER REF NOTE: For Subcarrier Regenerator, the second chroma amp is not used; Pins 13,14, and 15 are not connected and pin 16 is grounded. FIGURE 6. TYPICAL APPLICATION OF THE CA3126 AS A SUBCARRIER REGENERATOR CA3126 0. 0. ...