1
涔犻
1
1-1
鏌愪俊婧愮殑绗﹀彿闆嗙敱
A
銆?/p>
B
銆?/p>
C
銆?/p>
D
銆?/p>
E
銆?/p>
F
缁勬垚锛岃姣忎釜绗﹀彿鐙珛鍑虹幇锛屽叾姒傜巼鍒嗗埆涓?
1/4
銆?/p>
1/4
銆?/p>
1/16
銆?/p>
1/8
銆?/p>
1/16
銆?/p>
1/4
锛岃瘯姹傝淇℃伅婧愯緭鍑虹鍙风殑骞冲潎淇℃伅閲忋�?/p>
1-2
宸茬煡鏌愬洓杩涘埗淇℃簮
{0
锛?/p>
1
锛?/p>
2
锛?/p>
3}
锛屾瘡涓鍙风嫭绔嬪嚭鐜帮紝瀵瑰簲鐨勬鐜?/p>
P
0
銆?/p>
P
1
銆?/p>
P
2
銆?/p>
P
3
锛?
涓?/p>
P
0
+P
1
+P
2
+P
3
=1
銆?/p>
锛?/p>
1
锛夎瘯璁＄畻璇ヤ俊婧愮殑骞冲潎淇℃伅閲忋�?/p>
锛?/p>
2
锛夋瘡涓鍙风殑姒傜巼涓哄灏戞椂锛屽钩鍧囦俊鎭噺鏈�澶э紵
1-3
璁炬煇鏁板瓧浼犺緭绯荤粺浼犻�佷簩杩涘埗淇″彿锛?/p>
鐮佸厓閫熺巼
R
B2
=2400B
锛?/p>
璇曟眰璇ョ郴缁熺殑淇℃伅閫熺巼
R
b2
銆?
鑻ヨ绯荤粺鏀逛负鍗佸叚杩涘埗淇″彿锛岀爜鍏冮�熺巼涓嶅彉锛屽垯姝ゆ椂鐨勭郴缁熶俊鎭�熺巼涓哄灏戯紵
1-4
宸茬煡鏌愭暟瀛椾紶杈撶郴缁熶紶閫佸叓杩涘埗淇″彿锛屼俊鎭�熺巼涓?/p>
3600b/s
锛岃瘯闂爜鍏冮�熺巼涓哄灏戯紵
1-5
宸茬煡浜岃繘鍒朵俊鍙风殑浼犺緭閫熺巼涓?/p>
4800b/s
锛?/p>
璇曢棶鍙樻崲鎴愬洓杩涘埗鍜屽叓杩涘埗鏁板瓧淇″彿鏃讹紝
浼犺緭
閫熺巼鍚勪负澶氬皯锛堢爜鍏冮�熺巼涓嶅彉锛夛紵
1-6
宸茬煡鏌愭煇绯荤粺鐨勭爜鍏冮�熺巼涓?/p>
3600Kb
锛屾帴鏀剁鍦?/p>
1
灏忔椂鍐呭叡鏀跺埌
1296
涓敊璇爜鍏冿紝璇?
姹傜郴缁熺殑璇爜鐜?/p>
P
e
銆?/p>
1-7
鏌愮郴缁熺粡闀挎湡娴嬪畾锛屽畠鐨勮鐮佺巼
P
e
=10
-5
锛岀郴缁熺爜鍏冮�熺巼涓?/p>
1200B
锛岄棶鍦ㄥ闀挎椂闂村唴鍙?
鑳芥敹鍒?/p>
360
涓敊璇爜鍏冿紵
涔犻
3
3-1
鏌愪袱涓俊閬撶殑妯″瀷鍙瓑鏁堟垚濡傚浘
3-16
锛?/p>
a
锛?/p>
銆?/p>
锛?/p>
b
锛夋墍绀虹數璺紝璇曟眰鍏跺箙棰戠壒鎬у拰鐩搁鐗?
鎬э紝骞剁粯鍑哄畠浠殑鏇茬嚎鍥撅紝骞堕棶鏄畠浠槸鍚︿负鐞嗘兂淇￠亾锛?/p>
1
R
2
R
in
V
飥?/p>
out
V
飥?/p>
R
C
in
V
飥?/p>
out
V
飥?/p>
锛?/p>
a
锛?/p>
锛?/p>
b
锛?/p>
鍥?/p>
3-16
3-1
棰樺浘
3-2
鍏锋湁
6.5MHz
甯﹀鐨勬煇楂樻柉淇￠亾锛岃嫢淇￠亾涓俊鍙峰姛鐜囦笌鍣０鍔熺巼璋卞瘑搴︿箣姣斾负
45.5MH.
锛岃瘯姹傚叾淇￠亾瀹归噺銆?/p>
3-3
璁炬煇鎭掑弬淇￠亾鐨勪紶杈撳嚱鏁颁负
d
t
j
e
K
H
飦?/p>
飦?/p>
飥?/p>
飥?/p>
0
)
(
锛屽叾涓?/p>
0
K
鍜?/p>
d
t
閮芥槸甯告暟锛岃瘯纭畾淇″彿
s(t)
閫氳繃璇ヤ俊閬撳悗鐨勮緭鍑轰俊鍙风殑鏃跺煙琛ㄨ揪寮忥紝骞惰璁轰俊鍙锋湁鏃犲け鐪熴�?/p>
3-4
浠�涔堟槸鍒嗛泦鎺ユ敹锛熷父瑙佺殑鍑犵鍒嗛泦鏂瑰紡鏄粈涔堬紵
3-5
宸茬煡楂樻柉淇￠亾鐨勫甫瀹戒负
4kHz
锛屼俊鍙蜂笌鍣殑鍔熺巼姣斾负
63
锛岃瘯纭畾杩欑鐞嗘兂閫氫俊绯荤粺鐨?
鏋侀檺浼犺緭閫熺巼銆?/p>
3-6
鏌愪竴寰呬紶閫佺殑鍥剧墖绾﹀惈
6
10
25
.
2
飩?/p>
涓儚绱犮�?/p>
涓轰簡寰堝ソ鍦伴噸鐜板浘鐗囷紝
闇�瑕?/p>
12
涓寒搴︾數骞炽�?
鍋囪鎵�鏈夎繖浜涗寒搴︾數骞崇瓑姒傚嚭鐜帮紝璇曡绠楃敤
3
鍒嗛挓浼犻�佷竴寮犲浘鐗囨椂鎵�闇�鐨勪俊閬撳甫瀹?/p>
锛堣淇￠亾涓俊鍣姛鐜囨瘮涓?/p>
30Db
锛?/p>
銆?/p>