GPS receiver down converter circuit based on RF2498
Source: InternetPublisher:三月小雨 Keywords: Frequency Converter Receiver Updated: 2024/09/19
The RF2498 is a high performance CDMA tri-band/dual mode integrated LNA/mixer circuit, a tri-band LNA/downconverter. The RF2498 can be used in CDMA/cellular/PCS/GPS handsets, JCDMA/GSP handsets, CDMA modems/data cards, commercial and consumer systems, and battery-powered portable devices. The RF2498 meets IS-98 sensitivity, intermodulation, and single tone requirements. The RF2498 has a gain control of 29dB in the PCS band and 27.5dB in the cellular band. The RF2498 provides 37dB of gain for a GPS LNA/mixer application. The RF2498 uses a 3-state gain control method to meet IS-98 IMD testing. The RF2498 has a divide-by-2 pre-divider that allows the use of single-sideband or double-sideband VCOs. There is an integrated TX LO buffer on the chip. The bias current for the mixer and LNA blocks can be set by resistors off the chip. The chip adopts LCC (1eadless chip cartier)-32 package, and the chip size is 51MM×51MM
- Wireless transmission of integrated TV signals for amateur productions
- S9018 single tube super regenerative FM receiving circuit
- 1W FM Broadcast Transmitter
- MICRFl04 ASK 470~300 MHz Transmitter
- XEl209 70~30 kHz Ultra-Low Power CMOS Transceiver
- RXM-900-HP-II FM/FSK 928~902 MHz Receiver Module
- TR5100 FM 150~15 MHz transceiver
- RF2926 AM/FMASK/FSK/OOK 915/ 868/433 MHz Dual Conversion Transceiver
- T5761/T5760 ASK/FSK 870~868 MHz/928~902 MHz Receiver
- RCV420 4~20mA Precision Current Loop Receiver
- Phase sensitive rectifier circuit
- Circuit structure and equivalent circuit of downconverterb
- Connection between remote control setting box and inverter
- Motor frequency converter power frequency-variable frequency switching circuit
- 27MHz simple receiver circuit with external crystal oscillator
- receiver monitor.gif
- Universal inverter main circuit
- Efficient circuitry for 40MHz AM receivers
- Energy consumption braking circuit of PWM frequency converter
- CAN bus communication circuit