Table of Contents
Advertisement
Circuit Description
2-1-4. Power Amplifier Module (PAM101:BGY290E)
This chip is a GSM/EDGE compliant quad band Power amplifier module (PAM) with integrated power
control loop (PCL). The GSM (GMSK) line up is similar to the EDGE line-up, in the EDGE mode the
power control loop is disabled and the EDGE biasing (fine-tuning) control is enabled.
In the EDGE mode the device can be considered as a linear constant gain amplifier, the output
power adjustment and ramping profiles have to be provided by controlling the output power of the
transceiver
2-1-5. TCXO(TCX101:TCO-5871U 26MHz)
This system uses the 26MHz TCXO, TCO-5871U, Toyocom. AFC control signal form PCF5213
controls
frequency from 26MHz x-tal. It generates the clock frequency. This clock is connected to UAA3587.
This module generates the 26MHz reference clock to drive the logic and RF.
It is turned on when the supply voltage Vcc(SYN) is applied.
After buffering a reference clock of 26MHz is supplied to the other parts of the system
through the transceiver pin CLKOUT.
2-2. Logic Circuit description of SGH-i750
2-2-1. Power Supply(U204:PCF50603)
8 low-dropout regulators designed specifically for GSM applications power the terminal and help
ensure optimal system performance and long battery life. Dedicated SIM supply supports 3.0 V and
1.8 V cards including a power saving ECO mode for the power down mode of the SIM card.
Serial 400 kHz I2C interface to transfer the control data between the PCF50603 and the host
controller.
I2C BUS serial interface provides access to control and configuration registers. This interface gives a
microprocessor full control of the PCF50603 and enables system designers to maximize both standby
and talk times.
Supervisory functions. including a reset generator, an input voltage monitor, and a temperature sensor,
support reliable system design. These functions work together to ensure proper system behavior
during start-up or in the event of a fault condition(low microprocessor voltage, insufficient battery
energy, or excessive die temperature).
The CGU (clock generator unit) generates all internal and external clocks for the PCF50603.
The CGU offers the following features:
A free-running oscillator generating the internal high clock frequency (clkcco). The typical frequency of
the high clock frequency is 3.6 MHz.
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
2-2
Advertisement
Table of Contents
