Hello.
I need some help with impedance matching!
I am designing an embedded unit, that has is supposed to have an output for external speaker/system. It should be matched so the impedance fits standard PC speakers (from what I could find it seems to be around 4 OhmsPc Speaker Impedance-Pc Speaker Impedance Manufacturers, Suppliers and Exporters on Alibaba.com)
The output comes from an MCU (LPC2132, this: http://www.keil.com/dd/docs/datashts/philips/lpc2131_32_34_36_38.pdf)
whitch makes PWM that goes into a buffer (this: http://www.nxp.com/documents/data_sheet/74LVC1G34.pdf, but I can change that if necessary).
How do I match the output impedance of the buffer so it fits the imput impedance of a standard PC speaker?
I need some help with impedance matching!
I am designing an embedded unit, that has is supposed to have an output for external speaker/system. It should be matched so the impedance fits standard PC speakers (from what I could find it seems to be around 4 OhmsPc Speaker Impedance-Pc Speaker Impedance Manufacturers, Suppliers and Exporters on Alibaba.com)
The output comes from an MCU (LPC2132, this: http://www.keil.com/dd/docs/datashts/philips/lpc2131_32_34_36_38.pdf)
whitch makes PWM that goes into a buffer (this: http://www.nxp.com/documents/data_sheet/74LVC1G34.pdf, but I can change that if necessary).
How do I match the output impedance of the buffer so it fits the imput impedance of a standard PC speaker?