AN2583 datasheet(11/18 Pages) STMICROELECTRONICS

Part #	AN2583

Description	M41T00AUD real-time clock with audio

PDF	18 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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11 / 18 page

AN2583

Audio characteristics

11/18

2.2.4

Bridged amplifiers

A bridged amplifier uses two identical amplifiers driven 180° out of phase. The circuit shown

in Figure 12 uses two single supply amplifiers, AX. These would each be comparable to the

amplifier of Figure 7.

The input signal is connected unchanged to the left amplifier and inverted prior to going to

the right amplifier thus making the right one 180° out of phase with the left.

The outputs of the two amps, VL+ and VL–, are each biased at VDD/2. Thus, the quiescent

difference between them is 0 V. Therefore, no DC blocking capacitor is required at the load.

Figure 12.

Bridged amplifiers

Each output can swing between VDD and ground as shown in Figure 13.

Figure 13.

Outputs of bridged amplifier

VIN

VDD

–

VL+

VL–

VDD

ai13938

VDD / 2

VL–

VDD

VL+

VDD

VL-PK

VDD

ai13939

AN2583 Datasheet(PDF) 11 Page - STMicroelectronics