ml7050la Oki Semiconductor, ml7050la Datasheet - Page 9

• Manufacturer Part Number: ml7050la
• Description: Bluetooth Rf Transceiver Ic
• Manufacturer: Oki Semiconductor

FEDL7050LA-02
1 Oki Semiconductor
ML7050LA
DESCRIPTION OF INTERNAL BLOCKS
Transmit filter (Gaussian filter):
The input data is converted into a frequency modulation signal by a filter with Gaussian characteristics and is sent
to the VCO.
Frequency control section (VCO, PLL, Loop Filter, AMP and SW):
Generates a frequency in the 2.4 GHz to 2.5 GHz band (ISM band). During transmission, the VCO oscillator
frequency is modulated by the modulation signal output by the Gaussian filter. The PLL frequency is controlled
by the signals PLL_DATA, PLL_CLK, and PLL_LE. The switch SW (for Local) distributes the oscillator output
to the transmitter circuit and the receiver circuit depending on the control signal (TX_POW/RX_POW).
Power amplifier (PA):
This is the power amplifier for the transmitter.
Transmit/Receive selection switch (SW for Ant)
Depending on the control signal (TX_POW/RX_POW), this switch feeds the output of the power amplifier to the
antenna during transmission. During reception, the received signal of the antenna is fed to the LNA.
Reception amplifier (LNA):
This amplifies the weak RF received signal from the antenna.
Image Rejection Mixer (IRM):
Converts the output signal from the LNA (2.4 to 2.5 GHz) into an intermediate frequency and also eliminates the
image frequency component.
IF Band pass filter (IF BPF):
Removes the signal of the nearby bands.
Limiting amplifier:
Amplifies the signal converted into the intermediate frequency up to a specific amplitude.
Demodulator (DEMOD):
The received signal is demodulated using the delay detector circuit.
Filter tuning (Gm-C Tuning):
The reference clock is compared with the oscillator frequency inside the tuning circuit, and the frequency
characteristics of the Gm-C filter is adjusted automatically.
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