基于DDS信号技术的信号发生器的设计
直接数字式频率合成技术DDS是新一代的频率合成技术，采用数字控制信号的相位增加技术，具有频率分辨率高，频率切换快，频率切换时相位连续和相位噪声低以及全数字化易于集成等优点而被广泛采用。
一．程序代码（1）ADDER32B）
libraryieeeuseieeestd_logic_1164alluseieeestd_logic_u
sig
edalle
tityADDER32Bisportai
i
std_logic_vector31dow
to0bi
i
std_logic_vector31dow
to0coutoutstd_logic_vector31dow
to0e
darchitectureo
eofADDER32Bisbegi
coutai
bi
e
d（2）juxi
g_romLIBRARYieeeUSEieeestd_logic_1164all
fLIBRARYaltera_mfUSEaltera_mfallENTITYjuxi
g_romISPORTaddress0clockqENDjuxi
g_romARCHITECTURESYNOFjuxi
g_romISSIGNALsub_wire0STD_LOGIC_VECTOR7DOWNTO0COMPONENTaltsy
cramGENERICaddress_aclr_ai
it_fileSTRINGINSTD_LOGICOUTSTD_LOGIC_VECTOR7DOWNTO0INSTD_LOGIC_VECTOR11DOWNTO
STRINGSTRING
i
te
ded_device_familylpm_hi
tlpm_type
umwords_aoperatio
_modeSTRINGSTRING
NATURALSTRING
foutdata_aclr_aoutdata_reg_awidthad_awidth_a
STRINGSTRING
NATURALNATURALNATURAL
width_bytee
a_aPORT
clock0INSTD_LOGICaddress_aINSTD_LOGIC_VECTOR11DOWNTO0q_aENDCOMPONENTBEGINqsub_wire07DOWNTO0OUTSTD_LOGIC_VECTOR7DOWNTO0
altsy
cram_compo
e
taltsy
cramGENERICMAPaddress_aclr_a