LA1245 Sanyo Semiconductor Corporation, LA1245 Datasheet
LA1245
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LA1245 Summary of contents
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... Ordering number : EN737F Overview LA1245 is a high performance used electronic tuner. It provides an automatic search-stop signal, local oscillator buffer-output, and the low level local oscillation, as well as providing all other functions required tuner. Moreover, the stable local oscillation from facilitates the use of many band ...
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... Local oscillation fluctuation within a band Signal meter band width Selectivity IF interference Image frequency interference ratio * BFB450C4 N (Murata, Co.,) was used as a narrow band filter. (Note) 0 dBm=775mV, 0 dBu=1µV. LA1245 Symbol Conditions max Pin Pin 5, 7 Pin 3 max Pin 5+7+8+14 CC Pin 18 ...
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... Thus, the value of the semi-fixed resistor is determined to be about 30kΩ. When the value limited and saturated to the source voltage recommended to follow the condition of V When a narrow band serial resonator is used, include the resonant impedance to determine the value of R LA1245 and R both in wide band and narrow band since R ...
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... Notes on LA1245 usage 1. When suddenly tuned to a broadcasting station of intermediate or high field strength, a large current of high frequency flows into the signal meter circuit, causing the local oscillator malfunctions and abnormal noises. To eliminate this : ≥240Ω for manual tuning type. · Use R 208 ≥ ...
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... In this case, connect a capacitor of about 30pF between pin 20 and GND. To observe parasitic oscillation, connect a capacitor of 5pF in series with the probe. If the probe is connected direct to pin 20, the input capacitance of the probe causes parasitic oscillation to stop, which makes it impossible to observe. Sample Application Circuit 1 LA1245 to allow the fluctuation when Rg=520Ω ...
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... LA1245 No.737-6/11 ...
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... LA1245 No.737-7/11 ...
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... Sample Application Circuit 2 : LA1245 Using variable capacitance diodes No.737-8/11 ...
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... Sample Application Circuit 3 : Rejecting IFT (II) Following 2 changes are recommended as C-conpling without IFT (II) Comparison of characteristics varying parts. LA1245 No.737-9/11 ...
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... Peripheral Parts (1) Bar Antenna (34H-052-869 Sumida Co.,) (2) Bar Antenna (C-4698 Coil Snake Co.,) (3) Osc coil LA1245 No.737-10/11 ...
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... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of June, 1997. Specifications and information herein are subject to change without notice. LA1245 No.737-11/11 ...