DSP Blockset

dB Gain

Apply a gain specified in decibels.

Library

Math Functions / Math Operations

Description

The dB Gain block multiplies the input by the decibel values specified in the Gain parameter. For an M-by-N input matrix u with elements u_ij, the Gain parameter can be a real M-by-N matrix with elements g_ij to be multiplied element-wise with the input, or a real scalar.

The value of k is 10 for power signals (select Power as the Input signal parameter) and 20 for voltage signals (select Amplitude as the Input signal parameter).

The value of the equivalent linear gain

is displayed in the block icon below the dB gain value. The size and frame status of the output are the same as the input.

Dialog Box

Gain

The dB gain to apply to the input, a scalar or a real M-by-N matrix. Tunable.

Input signal

The type of input signal: Power or Amplitude. Tunable.

Supported Data Types

• Double-precision floating point
• Single-precision floating point

To learn how to convert to the above data types in MATLAB and Simulink, see Supported Data Types and How to Convert to Them.

See Also

dB Conversion	DSP Blockset
Math Function	Simulink
log10	MATLAB

Also see Math Operations for a list of all the blocks in the Math Operations library.

dB Conversion

DCT