Peak detector circuit

Details Peak detector circuit Peak detector circuit

1998-01-23

1999-10-19

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 58, G01R 1900

Patent

active

059695455

ABSTRACT:
A peak detector circuit (100) includes an output transconductance amplifier (102), a current rectifier (104) and an averaging circuit (108). The current rectifier includes an amplifier (115) which reduces input impedance of the current rectifier to increase the operating frequency of the peak detector circuit. An isolator (106) employs a current mirror (509) with a cascode transistor (512) having a bias potential which is dynamically adjusted to achieve accurate mirroring. An amplifier of a common mode feedback circuit (110) has improved linearity.

REFERENCES:
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patent: 5353028 (1994-10-01), Wit et al.
patent: 5489872 (1996-02-01), Gopinathan
patent: 5640681 (1997-06-01), Barrett, Jr. et al.
patent: 5721507 (1998-02-01), Fujii et al.
patent: 5798665 (1998-08-01), Ichihara
Pan, Tzu-Wang et al., "A Wide-Band CMOS Read Amplifier for Magnetic Data Storage Systems", IEEE Journal of Solid-State Circuits, vol. 27, No. 6, Jun. 1992, pp. 863-873.
Steyaert, Michael S. et al., "A CMOS Rectifier-Integrator for Amplitude Detection in Hard Disk Servo Loops", IEEE Journal of Solid-State Circuits, vol. 30, No. 7, Jul. 1995, pp. 743-751.

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