三极管低频放大单元电路

类别：专题新闻　出处：网络整理　发布于：2007-03-29 08:47:05 | 3463 次阅读

有趣的电路请大家分析？

(2006-08-15,3134) [查看全文]

一种抗干扰复位电路

(2006-08-15,2254) [查看全文]

射极跟隨器參考電路

(2006-08-15,2283) [查看全文]

脉冲发生电路

(2006-08-15,1903) [查看全文]

Hi-Fi 前置放大器

Hi-Fi 前置放大器 This circuit was submitted by Graham Maynard from Newtownabbey, Northern Ireland. It has an exceptionally fast high frequency response, as demonstrated by applying an 100kHz squarewave to the input. All graphs were produced using Tina Pro.

(2005-12-06,4086) [查看全文]

ECM 麦克前置放大器

ECM 麦克前置放大器 Both transistors are low noise types. In the original circuit, I used BC650C which is an ultra low noise device. These transistors are now hard to find but BC109C are a good replacement. The circuit is very device tolerant and will set its quiescent point at roughly half the supply voltage at the emitter of the last transistor. The electret condenser microphone (ECM) contains a very sensitive microphone element and an internal FET preamp, a power supply in the range 2 to 10 volts DC is therefore necessary. Suitable ECM's may be obtained from Maplin Electronics. The 1k resistor limits the current to the mic. The output impedance is very low and well suited to driving cables over distances up to 50 meters. Screened cable therefore is not necessary.

(2005-12-06,2803) [查看全文]

成熟低成本的均流电路