diff --git a/libraries/base/common/src/vhdl/common_lfsr_sequences_pkg.vhd b/libraries/base/common/src/vhdl/common_lfsr_sequences_pkg.vhd
index f4b15c5e2a8bfd028e1bbb8598b8fa0746999faa..a0872d1629bee3f514b571b8498fcf0defbf0039 100644
--- a/libraries/base/common/src/vhdl/common_lfsr_sequences_pkg.vhd
+++ b/libraries/base/common/src/vhdl/common_lfsr_sequences_pkg.vhd
@@ -1,6 +1,6 @@
 --------------------------------------------------------------------------------
 --
--- Copyright (C) 2009
+-- Copyright (C) 2019
 -- ASTRON (Netherlands Institute for Radio Astronomy) <http://www.astron.nl/>
 -- JIVE (Joint Institute for VLBI in Europe) <http://www.jive.nl/>
 -- P.O.Box 2, 7990 AA Dwingeloo, The Netherlands
@@ -19,6 +19,15 @@
 -- along with this program.  If not, see <http://www.gnu.org/licenses/>.
 --
 --------------------------------------------------------------------------------
+
+-- Author:
+-- . Eric Kooistra
+-- Purpose:
+-- . Linear Feedback Shift Register based pseudo random sequence generation.
+-- Interface:
+-- . [n/a]
+-- Description:
+-- . Based on Xilinx application note xapp052.
  
 LIBRARY IEEE;
 USE IEEE.std_logic_1164.ALL;
diff --git a/libraries/base/common/src/vhdl/common_pkg.vhd b/libraries/base/common/src/vhdl/common_pkg.vhd
index 4ceb214df3b0676bc0981226e34adfbf77311fb1..32995bba7892d9272571e846cd3c2fdd116b5b53 100644
--- a/libraries/base/common/src/vhdl/common_pkg.vhd
+++ b/libraries/base/common/src/vhdl/common_pkg.vhd
@@ -1,6 +1,6 @@
 -------------------------------------------------------------------------------
 --
--- Copyright (C) 2009
+-- Copyright (C) 2019
 -- ASTRON (Netherlands Institute for Radio Astronomy) <http://www.astron.nl/>
 -- P.O.Box 2, 7990 AA Dwingeloo, The Netherlands
 --
@@ -19,6 +19,16 @@
 --
 -------------------------------------------------------------------------------
 
+-- Author:
+-- . Eric Kooistra
+-- Purpose:
+-- . Collection of commonly used base funtions
+-- Interface:
+-- . [n/a]
+-- Description:
+-- . This is a package containing generic constants and functions.
+-- . More information can be found in the comments near the code.
+
 LIBRARY IEEE;
 USE IEEE.STD_LOGIC_1164.ALL;
 USE IEEE.NUMERIC_STD.ALL;
diff --git a/libraries/base/common/src/vhdl/common_str_pkg.vhd b/libraries/base/common/src/vhdl/common_str_pkg.vhd
index 2d8c72da6e2f42e42fbab1007303506e7195d4c7..324bd41c218d2589de6e5b34ec4c81b59d78fb39 100644
--- a/libraries/base/common/src/vhdl/common_str_pkg.vhd
+++ b/libraries/base/common/src/vhdl/common_str_pkg.vhd
@@ -1,6 +1,6 @@
 -------------------------------------------------------------------------------
 --
--- Copyright (C) 2012
+-- Copyright (C) 2019
 -- ASTRON (Netherlands Institute for Radio Astronomy) <http://www.astron.nl/>
 -- P.O.Box 2, 7990 AA Dwingeloo, The Netherlands
 --
@@ -19,6 +19,15 @@
 --
 -------------------------------------------------------------------------------
 
+-- Author:
+-- . Daniel van der Schuur
+-- Purpose:
+-- . Collection of commonly used string funtions
+-- Interface:
+-- . [n/a]
+-- Description:
+-- . None
+
 LIBRARY IEEE, common_lib;
 USE IEEE.STD_LOGIC_1164.ALL;
 USE IEEE.NUMERIC_STD.ALL;
@@ -203,7 +212,6 @@ PACKAGE BODY common_str_pkg IS
   END hex_nibble_to_slv;
 
   FUNCTION int_to_str(int: INTEGER) RETURN STRING IS
---    CONSTANT c_max_len_int : NATURAL := 20;
     VARIABLE v_line: LINE;
     VARIABLE v_str: STRING(1 TO nof_digits_int(int)):= (OTHERS => ' ');
   BEGIN 
diff --git a/libraries/base/common/tb/vhdl/tb_common_pkg.vhd b/libraries/base/common/tb/vhdl/tb_common_pkg.vhd
index db6e7b3faa2cbf283489a03841e317546261f06d..00aac656e5fdc2a1e9e1520dc3efa2cd3a427cb7 100644
--- a/libraries/base/common/tb/vhdl/tb_common_pkg.vhd
+++ b/libraries/base/common/tb/vhdl/tb_common_pkg.vhd
@@ -1,6 +1,6 @@
 -------------------------------------------------------------------------------
 --
--- Copyright (C) 2011
+-- Copyright (C) 2019
 -- ASTRON (Netherlands Institute for Radio Astronomy) <http://www.astron.nl/>
 -- JIVE (Joint Institute for VLBI in Europe) <http://www.jive.nl/>
 -- P.O.Box 2, 7990 AA Dwingeloo, The Netherlands
@@ -20,6 +20,15 @@
 --
 -------------------------------------------------------------------------------
 
+-- Author:
+-- . Eric Kooistra
+-- Purpose:
+-- . Collection of commonly used base funtions for simulations
+-- Interface:
+-- . [n/a]
+-- Description:
+-- . More information can be found in the comments near the code.
+
 LIBRARY IEEE;
 USE IEEE.std_logic_1164.ALL;
 USE IEEE.NUMERIC_STD.ALL;