绗?/p>
1
椤?/p>
銆婄數瀛愮嚎璺�嬬浜旂珷
鐩存祦鏀惧ぇ鍣ㄥ拰闆嗘垚杩愮畻鏀惧ぇ鍣?/p>
鐝骇锛?/p>
濮撳悕锛?/p>
瀛﹀彿锛?/p>
鎴愮哗锛?/p>
涓�銆佸～绌洪锛?/p>
锛?/p>
20
脳
2=40
鍒嗭級
1
銆佺洿鎺ヨ�﹀悎鏀惧ぇ鐢佃矾瀛樺湪涓や釜闂
:
涓�鏄?/p>
锛屽厠鏈嶇殑鏂规硶鏄噰鐢?/p>
銆備簩鏄?/p>
锛涘厠鏈嶇殑鏂规硶鏄?/p>
銆?/p>
2
銆佸湪宸垎鏀惧ぇ鐢佃矾涓紝澶у皬鐩哥瓑銆佹瀬鎬ф垨鐩镐綅涓�鑷寸殑涓や釜杈撳叆淇″彿绉颁负
淇″彿锛?/p>
澶у皬鐩哥瓑锛屾瀬鎬ф垨鐩镐綅鐩稿弽鐨勪袱涓緭鍏ヤ俊鍙风О涓?/p>
淇″彿銆?/p>
3
銆佹姂鍒剁洿娴佹斁澶у櫒涓浂鐐规紓绉荤害鏈夋晥鐢佃矾鏄?/p>
锛屾斁澶х數璺腑锛?/p>
R
E
鍙
杈撳叆淇″彿璧疯礋鍙嶉浣滅敤锛岄�氬父鐢?/p>
浣滀负琛￠噺宸垎鏀惧ぇ鐢佃矾鎬ц兘浼樺姡
鐨勬寚鏍囥�?/p>
4
銆佺洿娴佹斁澶у櫒杈撳叆淇″彿涓洪浂鏃讹紝杈撳嚭鐢靛帇鍋忕鍏惰捣濮嬪�肩殑鐜拌薄绉颁负
銆?/p>
5
銆佸鍥炬墍绀猴紝
V
i
=10V
锛?/p>
R
1
=10
惟
锛?/p>
R
2
=20
惟
锛屽垯
I
1
=
锛?/p>
V
A
=
锛?/p>
V
O
=
銆?/p>
6
銆佸凡鐭ユ煇宸垎鏀惧ぇ鐢佃矾鐨?/p>
A
VD
=l00
锛?/p>
K
CMR
=60dB
銆傚垯
A
VC
=
銆?/p>
7
銆佺悊鎯虫儏鍐典笅锛岄泦鎴愯繍鏀剧殑鍚勯」鎶�鏈寚鏍囦负
:
A
V
=
锛?/p>
R
i
=
锛?/p>
R
O
=
锛?/p>
K
CMR
=
锛?/p>
V
锛?/p>
锛?/p>
V
锛?/p>
=
锛?/p>
I
锛?/p>
=I
锛?/p>
=
銆?/p>
浜屻�佸垽鏂锛?/p>
锛?/p>
6
脳
3=18
鍒嗭級
锛?/p>
锛?/p>
1
銆佷竴涓悊鎯崇殑宸垎鏀惧ぇ鐢佃矾锛屽彧鑳芥斁澶у樊妯′俊鍙凤紝涓嶈兘鏀惧ぇ鍏辨ā淇″彿銆?/p>
锛?/p>
锛?/p>
2
銆佸叡妯′俊鍙烽兘鏄洿娴佷俊鍙凤紝宸ā淇″彿閮芥槸浜ゆ祦淇″彿銆?/p>
锛?/p>
锛?/p>
3
銆佸樊鍔ㄦ斁澶х數璺殑
A
VD
瓒婂ぇ瓒婂ソ锛岃�?/p>
A
VC
鍒欒秺灏忚秺濂姐�?/p>
锛?/p>
锛?/p>
4
銆佷竴涓畬鍏ㄥ绉扮殑宸垎寮忔斁澶у櫒锛屽叾鍏辨ā鏀惧ぇ鍊嶆暟涓洪浂銆?/p>
锛?/p>
锛?/p>
5
銆佷氦娴佹斁澶у櫒鍙兘鏀惧ぇ浜ゆ祦淇″彿锛岀洿娴佹斁澶у櫒鍙兘鏀惧ぇ鐩存祦淇″彿銆?/p>
锛?/p>
锛?/p>
6
銆佸叡妯℃姂鍒舵瘮鎰堝ぇ锛屽樊鍒嗘斁澶х數璺姂鍒堕浂鐐规紓绉荤殑鑳藉姏鎰堝己銆?/p>
涓夈�侀�夋嫨棰橈細
锛?/p>
5
脳
4=20
鍒嗭級