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AN-157 Datasheet(PDF) 3 Page - IXYS Corporation |
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AN-157 Datasheet(HTML) 3 Page - IXYS Corporation |
3 / 5 page AN-157-R04 www.ixysic.com 3 Application Note: AN-157 The closest standard resistor values are 147 k Ω for RNTX, and 215 kΩ for RHTX. 3.2 +3 dBm into 600 Ohm Transmit Power Example The following application circuit uses component values determined by the design procedure above for +3 dBm transmit power into 600 Ω. Peak transmit power of +3 dBm into 600 Ω = 1.55 VP. 1.55/1.1 = 1.4. The calculations work out as follows: The closest standard resistor values are 215 Ω for RZNT and 357 kΩ for RNTF. Use these values to find for RNTX and RHTX as follows: Standard resistor values have been substituted in the circuit in Figure 1. RNTX 1 255 6640 ------------ + 140000 145.38kΩ = = RHTX 1 255 3320 ------------ + 200000 215.36kΩ = = RZNT 301 1.4 ⁄ = 215 = RNTF 499kΩ 1.4 ⁄ 356429 = = RNTX 1 215 6640 ------------ + 178500 184.28kΩ = = RHTX 1 215 3320 ------------ + 200000 212.95kΩ = = ( ( ( ( • • ( ( ( ( • • |
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