Open topic with navigation

ETPS (Envelope Tracking Power Supply)

This block is to specify the parameters for the ETPS, which are mostly used in the RF Voltage (power supply of PA) to Envelop Voltage transformation. Most of the definitions in this block follow the terminologies used in MIPI eTrak specification. Refer to Voltage Mapping for more details.

1. ETPS

ETPS Gain

Range: -20 to 20 dB

Default: 7 dB

Coupling: This setting will be grayed out if the Envelope Source is set to User Defined in Envelope Tracking block.

Set the ETPS Gain.

V_cc Offset

Range: 0 to 5 V

Default: 2.750 V

Coupling: This setting will be grayed out if the Envelope Source is set to User Defined in Envelope Tracking block.

Set the V_cc Offset of ETPS.

2. ETPS Input and Output

V_cm

Range: 0 to 2 V

Default: 450 mV

Coupling: This setting will be grayed out if the Envelope Source is set to User Defined in Envelope Tracking block.

Set the common mode voltage specified in the eTrak specification.

V_cc Clipping

Choices: On | Off

Default: Off

Coupling: This setting will be grayed out if the Envelope Source is set to User Defined in Envelope Tracking block.

Double-click or use the drop-down menu to specify whether to clip the envelope value using V_cc Max and V_cc Min values.

V_cc Max

Range: 0.1 to 5 V

Default: 3.8 V

Coupling: Available only when the Vcc Clipping is set to on.

Set the maximum value of V_cc. This parameter is available for Dual-band PA Test only.

If this value is set to a smaller value than V_cc Min, V_cc Min value will be reduced to (V_cc Max -0.1).

V_cc Min

Range: 0 to (Vcc Max - 0.1)

Default: 600 mV

Coupling: Available only when the Vcc Clipping is set to on.

Set the minimum value of V_cc. This parameter is available for Dual-band PA Test only.